---
title: "AMT Patents: The IP Behind PostPro | AMT PostPro"
description: "20 patent families and 26 granted patents and utility models since AMT's first vapor smoothing filing in 2017, each linked to its register."
canonical: https://amtechnologies.com/patents/
updated: 2026-10-07
type: company
---
Patents · Since January 2017

# The patents behind PostPro vapor smoothing.

AMT has filed its own inventions since January 9, 2017, starting with the controlled vapor smoothing process behind PostPro. These are the patent families on the public record, with every publication linked to its register entry.

AMT · As stated by AMT

50+[1]

patents granted or pending in post-processing technology. AMT counts rights country by country, including pending applications; the public record below counts inventions.

The largest patent portfolio in vapor smoothing[2].

- **Patent families**: 20
- **Granted patents and utility models**: 26
- **Publications on the record**: 114
- **Families in vapor smoothing**: 6

Public record as of October 6, 2026. Granted rights count 24 patents in the UK, Europe, the US and China plus 2 German utility models, each once.

Patent families

## Twenty inventions, one family at a time.

A family is one invention, filed in several offices. Each card shows what it protects in plain English, where it is granted and every publication on the record. Inventors on the current AMT team are named; other inventors are counted.

## Vapor smoothing

6 families · from the first controlled vapor smoothing machine to solvent recovery and new solvents

1. Family 01 Vapor smoothing ·

   ### Controlled vapor smoothing of polymer parts

   The core PostPro process: a controlled chamber that smooths each part to its size, complexity and the finish you ask for.

   - **Earliest priority**: Jan 9, 2017
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   #### 21 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2018127683A1 (opens in a new tab)](https://patents.google.com/patent/WO2018127683A1/en) | PCT | International application | Published | Jul 12, 2018 |
   | [GB2560073A (opens in a new tab)](https://patents.google.com/patent/GB2560073A/en) | UK | Application | Published, later granted | Aug 29, 2018 |
   | [CN110382211A (opens in a new tab)](https://patents.google.com/patent/CN110382211A/en) | China | Application | Published, later granted | Oct 25, 2019 |
   | [EP3565712A1 (opens in a new tab)](https://patents.google.com/patent/EP3565712A1/en) | Europe | Application | Published, later granted | Nov 13, 2019 |
   | [HK1259651A1 (opens in a new tab)](https://patents.google.com/patent/HK1259651A1/en) | Hong Kong | Application | Published | Dec 6, 2019 |
   | [US20190375158A1 (opens in a new tab)](https://patents.google.com/patent/US20190375158A1/en) | US | Application | Abandoned | Dec 12, 2019 |
   | [DE202017007250U1 (opens in a new tab)](https://patents.google.com/patent/DE202017007250U1/en) | Germany | Utility model | Granted | May 25, 2020 |
   | [DE202017007255U1 (opens in a new tab)](https://patents.google.com/patent/DE202017007255U1/en) | Germany | Utility model | Granted | May 25, 2020 |
   | [GB2560073B (opens in a new tab)](https://patents.google.com/patent/GB2560073B/en) | UK | Granted patent | Granted | Jun 17, 2020 |
   | [GB2582222A (opens in a new tab)](https://patents.google.com/patent/GB2582222A/en) | UK | Application | Published, later granted | Sep 16, 2020 |
   | [GB2582225A (opens in a new tab)](https://patents.google.com/patent/GB2582225A/en) | UK | Application | Published, later granted | Sep 16, 2020 |
   | [GB2582222B (opens in a new tab)](https://patents.google.com/patent/GB2582222B/en) | UK | Granted patent | Granted | Mar 31, 2021 |
   | [GB2582225B (opens in a new tab)](https://patents.google.com/patent/GB2582225B/en) | UK | Granted patent | Granted | Mar 31, 2021 |
   | [CN110382211B (opens in a new tab)](https://patents.google.com/patent/CN110382211B/en) | China | Granted patent | Granted | Nov 9, 2021 |
   | [US20230091181A1 (opens in a new tab)](https://patents.google.com/patent/US20230091181A1/en) | US | Application | Published, later granted | Mar 23, 2023 |
   | [EP3565712B1 (opens in a new tab)](https://patents.google.com/patent/EP3565712B1/en) | Europe | Granted patent | Granted | Sep 6, 2023 |
   | [DK3565712T3 (opens in a new tab)](https://patents.google.com/patent/DK3565712T3/en) | Denmark | Validation of EP grant | Granted | Nov 20, 2023 |
   | [ES2961482T3 (opens in a new tab)](https://patents.google.com/patent/ES2961482T3/en) | Spain | Validation of EP grant | Granted | Mar 12, 2024 |
   | [PL3565712T3 (opens in a new tab)](https://patents.google.com/patent/PL3565712T3/en) | Poland | Validation of EP grant | Granted | Apr 22, 2024 |
   | [US12162220B2 (opens in a new tab)](https://patents.google.com/patent/US12162220B2/en) | US | Granted patent | Granted | Dec 10, 2024 |
   | [US20250050584A1 (opens in a new tab)](https://patents.google.com/patent/US20250050584A1/en) | US | Application | Published | Feb 13, 2025 |
   - UK [GB2560073B (opens in a new tab)](https://patents.google.com/patent/GB2560073B/en)
   - UK [GB2582222B (opens in a new tab)](https://patents.google.com/patent/GB2582222B/en)
   - UK [GB2582225B (opens in a new tab)](https://patents.google.com/patent/GB2582225B/en)
   - Europe [EP3565712B1 (opens in a new tab)](https://patents.google.com/patent/EP3565712B1/en)
   - US [US12162220B2 (opens in a new tab)](https://patents.google.com/patent/US12162220B2/en)
   - China [CN110382211B (opens in a new tab)](https://patents.google.com/patent/CN110382211B/en)
   - Germany [DE202017007250U1 (opens in a new tab)](https://patents.google.com/patent/DE202017007250U1/en)
   - Germany [DE202017007255U1 (opens in a new tab)](https://patents.google.com/patent/DE202017007255U1/en)
2. Family 07 Vapor smoothing ·

   ### Smoothing binder-based parts, including metal

   A method that smooths binder-based printed parts (for example metal) by applying a chemical, such as a condensed vapor, that softens the binder so surface powder flows into the layer steps.

   - **Earliest priority**: Jun 10, 2019
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   No grant yet on the public record.

   #### 5 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2020249936A1 (opens in a new tab)](https://patents.google.com/patent/WO2020249936A1/en) | PCT | International application | Published | Dec 17, 2020 |
   | [GB2584834A (opens in a new tab)](https://patents.google.com/patent/GB2584834A/en) | UK | Application | Published | Dec 23, 2020 |
   | [CN114040824A (opens in a new tab)](https://patents.google.com/patent/CN114040824A/en) | China | Application | Published | Feb 11, 2022 |
   | [EP3980206A1 (opens in a new tab)](https://patents.google.com/patent/EP3980206A1/en) | Europe | Application | Published | Apr 13, 2022 |
   | [US20220250154A1 (opens in a new tab)](https://patents.google.com/patent/US20220250154A1/en) | US | Application | Published | Aug 11, 2022 |
3. Family 08 Vapor smoothing ·

   ### Post-processing with heated solvent fluids

   A method that improves the surface finish of powder-based printed parts by applying a heated processing fluid containing selected solvents (organic esters, aromatic compounds or acetals).

   - **Earliest priority**: Mar 3, 2020
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   #### 12 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2021176217A1 (opens in a new tab)](https://patents.google.com/patent/WO2021176217A1/en) | PCT | International application | Published | Sep 10, 2021 |
   | [GB2594568A (opens in a new tab)](https://patents.google.com/patent/GB2594568A/en) | UK | Application | Published, later granted | Nov 3, 2021 |
   | [GB2594568B (opens in a new tab)](https://patents.google.com/patent/GB2594568B/en) | UK | Granted patent | Granted | Jun 15, 2022 |
   | [GB2604764A (opens in a new tab)](https://patents.google.com/patent/GB2604764A/en) | UK | Application | Published | Sep 14, 2022 |
   | [EP4114649A1 (opens in a new tab)](https://patents.google.com/patent/EP4114649A1/en) | Europe | Application | Published, later granted | Jan 11, 2023 |
   | [US20230166466A1 (opens in a new tab)](https://patents.google.com/patent/US20230166466A1/en) | US | Application | Published, later granted | Jun 1, 2023 |
   | [US11919262B2 (opens in a new tab)](https://patents.google.com/patent/US11919262B2/en) | US | Granted patent | Granted | Mar 5, 2024 |
   | [EP4114649B1 (opens in a new tab)](https://patents.google.com/patent/EP4114649B1/en) | Europe | Granted patent | Granted | Jun 12, 2024 |
   | [DK4114649T3 (opens in a new tab)](https://patents.google.com/patent/DK4114649T3/en) | Denmark | Validation of EP grant | Granted | Aug 19, 2024 |
   | [ES2985413T3 (opens in a new tab)](https://patents.google.com/patent/ES2985413T3/en) | Spain | Validation of EP grant | Granted | Nov 5, 2024 |
   | [PL4114649T3 (opens in a new tab)](https://patents.google.com/patent/PL4114649T3/en) | Poland | Validation of EP grant | Granted | Nov 12, 2024 |
   | [HUE068399T2 (opens in a new tab)](https://patents.google.com/patent/HUE068399T2/en) | Hungary | Validation of EP grant | Granted | Dec 28, 2024 |
   - UK [GB2594568B (opens in a new tab)](https://patents.google.com/patent/GB2594568B/en)
   - Europe [EP4114649B1 (opens in a new tab)](https://patents.google.com/patent/EP4114649B1/en)
   - US [US11919262B2 (opens in a new tab)](https://patents.google.com/patent/US11919262B2/en)
4. Family 10 Vapor smoothing ·

   ### Vapor smoothing investment casting patterns

   A vapor smoothing process for 3D printed investment casting patterns that controls chamber temperature and pressure while drying, so the patterns are smoothed without deforming.

   - **Earliest priority**: Jun 18, 2020
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   No grant yet on the public record.

   #### 1 publication on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2021255467A1 (opens in a new tab)](https://patents.google.com/patent/WO2021255467A1/en) | PCT | International application | Published | Dec 23, 2021 |
5. Family 11 Vapor smoothing ·

   ### Solvent recovery after vapor smoothing

   A vapor-smoothing process step that condenses the solvent vapor after processing by changing chamber pressure and/or temperature, then extracts it for recovery.

   - **Earliest priority**: Jul 6, 2020
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 3 more named inventors

   #### 2 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [GB2597240A (opens in a new tab)](https://patents.google.com/patent/GB2597240A/en) | UK | Application | Published, later granted | Jan 26, 2022 |
   | [GB2597240B (opens in a new tab)](https://patents.google.com/patent/GB2597240B/en) | UK | Granted patent | Granted | Nov 9, 2022 |
   - UK [GB2597240B (opens in a new tab)](https://patents.google.com/patent/GB2597240B/en)
6. Family 17 Vapor smoothing ·

   ### Smoothing with carboxylic ester solvents

   A smoothing process for thermoplastic printed parts that uses a heated carboxylic ester solvent (for example a lactone), as a liquid or condensed vapor, in place of alcohol-based solvents.

   - **Earliest priority**: Jul 5, 2022
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   No grant yet on the public record.

   #### 6 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [GB2620398A (opens in a new tab)](https://patents.google.com/patent/GB2620398A/en) | UK | Application | Published | Jan 10, 2024 |
   | [WO2024009070A1 (opens in a new tab)](https://patents.google.com/patent/WO2024009070A1/en) | PCT | International application | Published | Jan 11, 2024 |
   | [GB2620652A (opens in a new tab)](https://patents.google.com/patent/GB2620652A/en) | UK | Application | Published | Jan 17, 2024 |
   | [CN119522251A (opens in a new tab)](https://patents.google.com/patent/CN119522251A/en) | China | Application | Published | Feb 25, 2025 |
   | [EP4551642A1 (opens in a new tab)](https://patents.google.com/patent/EP4551642A1/en) | Europe | Application | Published | May 14, 2025 |
   | [US20250381743A1 (opens in a new tab)](https://patents.google.com/patent/US20250381743A1/en) | US | Application | Published | Dec 18, 2025 |

## Other AMT inventions

14 families · surface inspection, automation, coloring, printing and finishing

1. Family 02 Surface inspection ·

   ### Surface roughness analysis from images

   A method and system that judge the condition (roughness) of a part's surface from image data, so finishing can be checked or controlled.

   - **Earliest priority**: Apr 16, 2018
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 3 more named inventors

   #### 9 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [GB2572953A (opens in a new tab)](https://patents.google.com/patent/GB2572953A/en) | UK | Application | Published, later granted | Oct 23, 2019 |
   | [WO2019202296A1 (opens in a new tab)](https://patents.google.com/patent/WO2019202296A1/en) | PCT | International application | Published | Oct 24, 2019 |
   | [GB2572953A8 (opens in a new tab)](https://patents.google.com/patent/GB2572953A8/en) | UK | Corrected publication | Published, later granted | Nov 27, 2019 |
   | [GB2572953B (opens in a new tab)](https://patents.google.com/patent/GB2572953B/en) | UK | Granted patent | Granted | Nov 18, 2020 |
   | [GB2572953B8 (opens in a new tab)](https://patents.google.com/patent/GB2572953B8/en) | UK | Corrected publication | Published | Feb 17, 2021 |
   | [EP3781400A1 (opens in a new tab)](https://patents.google.com/patent/EP3781400A1/en) | Europe | Application | Published, later granted | Feb 24, 2021 |
   | [DE19721338T1 (opens in a new tab)](https://patents.google.com/patent/DE19721338T1/en) | Germany | Translation of application | Published | Nov 11, 2021 |
   | [EP3781400B1 (opens in a new tab)](https://patents.google.com/patent/EP3781400B1/en) | Europe | Granted patent | Granted | Jan 29, 2025 |
   | [DK3781400T3 (opens in a new tab)](https://patents.google.com/patent/DK3781400T3/en) | Denmark | Validation of EP grant | Granted | Mar 31, 2025 |
   - UK [GB2572953B (opens in a new tab)](https://patents.google.com/patent/GB2572953B/en)
   - Europe [EP3781400B1 (opens in a new tab)](https://patents.google.com/patent/EP3781400B1/en)
2. Family 03 Powder removal ·

   ### Powder removal with fluid flow and ultrasound

   Equipment that removes leftover powder from powder-bed 3D-printed parts by agitating them in a fluid, including with ultrasound.

   - **Earliest priority**: May 25, 2018
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   #### 6 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2019224556A1 (opens in a new tab)](https://patents.google.com/patent/WO2019224556A1/en) | PCT | International application | Published | Nov 28, 2019 |
   | [GB2575544A (opens in a new tab)](https://patents.google.com/patent/GB2575544A/en) | UK | Application | Published | Jan 15, 2020 |
   | [EP3801955A1 (opens in a new tab)](https://patents.google.com/patent/EP3801955A1/en) | Europe | Application | Published | Apr 14, 2021 |
   | [US20210221063A1 (opens in a new tab)](https://patents.google.com/patent/US20210221063A1/en) | US | Application | Published, later granted | Jul 22, 2021 |
   | [DE19730435T1 (opens in a new tab)](https://patents.google.com/patent/DE19730435T1/en) | Germany | Translation of application | Published | Nov 11, 2021 |
   | [US11534973B2 (opens in a new tab)](https://patents.google.com/patent/US11534973B2/en) | US | Granted patent | Granted | Dec 27, 2022 |
   - US [US11534973B2 (opens in a new tab)](https://patents.google.com/patent/US11534973B2/en)
3. Family 04 Coloring ·

   ### Coloring parts with airborne dye and solvent vapor

   A chamber process that colors 3D-printed polymer parts by combining dye particles carried in gas with solvent vapor.

   - **Earliest priority**: Jul 31, 2018
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko, Giorgio Ioannides and 3 more named inventors

   #### 16 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [GB2571804A (opens in a new tab)](https://patents.google.com/patent/GB2571804A/en) | UK | Application | Published | Sep 11, 2019 |
   | [GB2571804A8 (opens in a new tab)](https://patents.google.com/patent/GB2571804A8/en) | UK | Corrected publication | Published | Sep 25, 2019 |
   | [WO2020025944A1 (opens in a new tab)](https://patents.google.com/patent/WO2020025944A1/en) | PCT | International application | Published | Feb 6, 2020 |
   | [GB2577772A (opens in a new tab)](https://patents.google.com/patent/GB2577772A/en) | UK | Application | Published, later granted | Apr 8, 2020 |
   | [EP3668705A1 (opens in a new tab)](https://patents.google.com/patent/EP3668705A1/en) | Europe | Application | Published, later granted | Jun 24, 2020 |
   | [CN111344138A (opens in a new tab)](https://patents.google.com/patent/CN111344138A/en) | China | Application | Published, later granted | Jun 26, 2020 |
   | [US20200238620A1 (opens in a new tab)](https://patents.google.com/patent/US20200238620A1/en) | US | Application | Published, later granted | Jul 30, 2020 |
   | [GB2577772B (opens in a new tab)](https://patents.google.com/patent/GB2577772B/en) | UK | Granted patent | Granted | Nov 11, 2020 |
   | [GB2584208A (opens in a new tab)](https://patents.google.com/patent/GB2584208A/en) | UK | Application | Published, later granted | Nov 25, 2020 |
   | [GB2584208A9 (opens in a new tab)](https://patents.google.com/patent/GB2584208A9/en) | UK | Corrected publication | Published, later granted | Apr 28, 2021 |
   | [GB2584208B (opens in a new tab)](https://patents.google.com/patent/GB2584208B/en) | UK | Granted patent | Granted | Jul 7, 2021 |
   | [DE19750141T1 (opens in a new tab)](https://patents.google.com/patent/DE19750141T1/en) | Germany | Translation of application | Published | Nov 11, 2021 |
   | [CN111344138B (opens in a new tab)](https://patents.google.com/patent/CN111344138B/en) | China | Granted patent | Granted | Feb 8, 2022 |
   | [US11628623B2 (opens in a new tab)](https://patents.google.com/patent/US11628623B2/en) | US | Granted patent | Granted | Apr 18, 2023 |
   | [EP3668705B1 (opens in a new tab)](https://patents.google.com/patent/EP3668705B1/en) | Europe | Granted patent | Granted | Dec 24, 2025 |
   | [EP3668705C0 (opens in a new tab)](https://patents.google.com/patent/EP3668705C0/en) | Europe | Unitary effect | Published | Dec 24, 2025 |
   - UK [GB2577772B (opens in a new tab)](https://patents.google.com/patent/GB2577772B/en)
   - UK [GB2584208B (opens in a new tab)](https://patents.google.com/patent/GB2584208B/en)
   - Europe [EP3668705B1 (opens in a new tab)](https://patents.google.com/patent/EP3668705B1/en)
   - US [US11628623B2 (opens in a new tab)](https://patents.google.com/patent/US11628623B2/en)
   - China [CN111344138B (opens in a new tab)](https://patents.google.com/patent/CN111344138B/en)
4. Family 05 Automation ·

   ### Automated post-processing with inspection feedback

   An automated line that inspects a printed part's surface finish and uses that measurement to adjust support removal and surface processing.

   - **Earliest priority**: Oct 5, 2018
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   #### 15 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2020070518A1 (opens in a new tab)](https://patents.google.com/patent/WO2020070518A1/en) | PCT | International application | Published | Apr 9, 2020 |
   | [GB2579276A (opens in a new tab)](https://patents.google.com/patent/GB2579276A/en) | UK | Application | Published, later granted | Jun 17, 2020 |
   | [GB2583430A (opens in a new tab)](https://patents.google.com/patent/GB2583430A/en) | UK | Application | Published, later granted | Oct 28, 2020 |
   | [GB2579276B (opens in a new tab)](https://patents.google.com/patent/GB2579276B/en) | UK | Granted patent | Granted | Dec 2, 2020 |
   | [CN112996651A (opens in a new tab)](https://patents.google.com/patent/CN112996651A/en) | China | Application | Published | Jun 18, 2021 |
   | [EP3860829A1 (opens in a new tab)](https://patents.google.com/patent/EP3860829A1/en) | Europe | Application | Published, later granted | Aug 11, 2021 |
   | [GB2583430B (opens in a new tab)](https://patents.google.com/patent/GB2583430B/en) | UK | Granted patent | Granted | Nov 10, 2021 |
   | [DE19787387T1 (opens in a new tab)](https://patents.google.com/patent/DE19787387T1/en) | Germany | Translation of application | Published | Nov 11, 2021 |
   | [US20210387415A1 (opens in a new tab)](https://patents.google.com/patent/US20210387415A1/en) | US | Application | Published, later granted | Dec 16, 2021 |
   | [EP3860829B1 (opens in a new tab)](https://patents.google.com/patent/EP3860829B1/en) | Europe | Granted patent | Granted | Jan 22, 2025 |
   | [EP4497594A2 (opens in a new tab)](https://patents.google.com/patent/EP4497594A2/en) | Europe | Application | Published | Jan 29, 2025 |
   | [DK3860829T3 (opens in a new tab)](https://patents.google.com/patent/DK3860829T3/en) | Denmark | Validation of EP grant | Granted | Mar 3, 2025 |
   | [DK3860829T5 (opens in a new tab)](https://patents.google.com/patent/DK3860829T5/en) | Denmark | Corrected publication | Granted | Mar 24, 2025 |
   | [EP4497594A3 (opens in a new tab)](https://patents.google.com/patent/EP4497594A3/en) | Europe | Application | Published | Jul 30, 2025 |
   | [US12565004B2 (opens in a new tab)](https://patents.google.com/patent/US12565004B2/en) | US | Granted patent | Granted | Mar 3, 2026 |
   - UK [GB2579276B (opens in a new tab)](https://patents.google.com/patent/GB2579276B/en)
   - UK [GB2583430B (opens in a new tab)](https://patents.google.com/patent/GB2583430B/en)
   - Europe [EP3860829B1 (opens in a new tab)](https://patents.google.com/patent/EP3860829B1/en)
   - US [US12565004B2 (opens in a new tab)](https://patents.google.com/patent/US12565004B2/en)
5. Family 06 Printing ·

   ### Powder-bed printer with build beds on a closed loop

   A powder-bed 3D printer whose build beds travel on a closed loop around a horizontal axis, making printed parts easier to reach.

   - **Earliest priority**: Apr 5, 2019
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

   #### 4 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2020201581A1 (opens in a new tab)](https://patents.google.com/patent/WO2020201581A1/en) | PCT | International application | Published | Oct 8, 2020 |
   | [GB2596175A (opens in a new tab)](https://patents.google.com/patent/GB2596175A/en) | UK | Application | Published, later granted | Dec 22, 2021 |
   | [EP3946899A1 (opens in a new tab)](https://patents.google.com/patent/EP3946899A1/en) | Europe | Application | Published | Feb 9, 2022 |
   | [GB2596175B (opens in a new tab)](https://patents.google.com/patent/GB2596175B/en) | UK | Granted patent | Granted | Jun 15, 2022 |
   - UK [GB2596175B (opens in a new tab)](https://patents.google.com/patent/GB2596175B/en)
6. Family 09 Support removal ·

   ### Separating supports with an expanding material

   A method that separates support structures from a printed part by applying a material that expands and pushes them apart.

   - **Earliest priority**: Jun 18, 2020
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 2 more named inventors

   No grant yet on the public record.

   #### 3 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2021255471A1 (opens in a new tab)](https://patents.google.com/patent/WO2021255471A1/en) | PCT | International application | Published | Dec 23, 2021 |
   | [EP4168202A1 (opens in a new tab)](https://patents.google.com/patent/EP4168202A1/en) | Europe | Application | Published | Apr 26, 2023 |
   | [US20230241684A1 (opens in a new tab)](https://patents.google.com/patent/US20230241684A1/en) | US | Application | Published | Aug 3, 2023 |
7. Family 12 Powder removal ·

   ### Powder removal with fluid jets from two directions

   A method and system that removes powder from printed parts or a powder cake by directing fluid flows at them from two different directions.

   - **Earliest priority**: Jul 24, 2020
   - **Inventors**: 6 named inventors

   No grant yet on the public record.

   #### 1 publication on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2022018447A1 (opens in a new tab)](https://patents.google.com/patent/WO2022018447A1/en) | PCT | International application | Published | Jan 27, 2022 |
8. Family 14 Coloring ·

   ### Coloring in a sequence of heated dye baths

   A coloring method that smooths a printed part and then dyes it in one or more heated dye baths in sequence, giving a wider color range without pre-mixing dyes.

   - **Earliest priority**: Feb 12, 2021
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 5 more named inventors

   No grant yet on the public record.

   #### 3 publications on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [WO2022171985A2 (opens in a new tab)](https://patents.google.com/patent/WO2022171985A2/en) | PCT | International application | Published | Aug 18, 2022 |
   | [GB2603898A (opens in a new tab)](https://patents.google.com/patent/GB2603898A/en) | UK | Application | Published | Aug 24, 2022 |
   | [WO2022171985A3 (opens in a new tab)](https://patents.google.com/patent/WO2022171985A3/en) | PCT | International application | Published | Sep 22, 2022 |
9. Family 15 Automation ·

   ### Feature-guided robotic part handling

   A method that adds a target feature (such as a hole) to a printed part so a camera-guided robot or actuator can find and pick it up automatically.

   - **Earliest priority**: Feb 19, 2021
   - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 2 more named inventors

   No grant yet on the public record.

   #### 1 publication on the record

   | Number | Office | Document | Status | Date |
   | --- | --- | --- | --- | --- |
   | [GB2603931A (opens in a new tab)](https://patents.google.com/patent/GB2603931A/en) | UK | Application | Published | Aug 24, 2022 |
10. Family 16 Printing ·

    ### Solvent or binder printing with solvent recovery

    A layer-by-layer printing method that applies a solvent or binder to selected areas of powder, then evaporates off the excess by heating and/or lowering the pressure, with a condenser to collect it.

    - **Earliest priority**: Sep 29, 2021
    - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

    No grant yet on the public record.

    #### 1 publication on the record

    | Number | Office | Document | Status | Date |
    | --- | --- | --- | --- | --- |
    | [GB2611314A (opens in a new tab)](https://patents.google.com/patent/GB2611314A/en) | UK | Application | Published | Apr 5, 2023 |
11. Family 18 Thermoset finishing ·

    ### Faster finishing of thermoset parts

    A method that heats the outer surface of a printed thermoset part to just above its heat distortion temperature so it can then be abraded (finished) faster and more easily.

    - **Earliest priority**: Nov 14, 2022
    - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

    #### 5 publications on the record

    | Number | Office | Document | Status | Date |
    | --- | --- | --- | --- | --- |
    | [GB2624248A (opens in a new tab)](https://patents.google.com/patent/GB2624248A/en) | UK | Application | Published, later granted | May 15, 2024 |
    | [WO2024105369A1 (opens in a new tab)](https://patents.google.com/patent/WO2024105369A1/en) | PCT | International application | Published | May 23, 2024 |
    | [GB2624248B (opens in a new tab)](https://patents.google.com/patent/GB2624248B/en) | UK | Granted patent | Granted | Apr 16, 2025 |
    | [EP4619220A1 (opens in a new tab)](https://patents.google.com/patent/EP4619220A1/en) | Europe | Application | Published | Sep 24, 2025 |
    | [US20260001275A1 (opens in a new tab)](https://patents.google.com/patent/US20260001275A1/en) | US | Application | Published | Jan 1, 2026 |
    - UK [GB2624248B (opens in a new tab)](https://patents.google.com/patent/GB2624248B/en)
12. Family 19 Fire retardancy ·

    ### Fire retardancy for polyamide parts

    A treatment that improves the fire retardancy of polyamide parts (such as printed PA12) by applying a heated solution containing a phosphate ester, by immersion or condensed vapor.

    - **Earliest priority**: Aug 13, 2024
    - **Inventors**: Joseph Crabtree, Dr. Konstantin Rybalcenko and 1 more named inventor

    No grant yet on the public record.

    #### 2 publications on the record

    | Number | Office | Document | Status | Date |
    | --- | --- | --- | --- | --- |
    | [GB2643407A (opens in a new tab)](https://patents.google.com/patent/GB2643407A/en) | UK | Application | Published | Feb 18, 2026 |
    | [WO2026038017A1 (opens in a new tab)](https://patents.google.com/patent/WO2026038017A1/en) | PCT | International application | Published | Feb 19, 2026 |
13. Family 20 Coloring ·

    ### Coloring polymer parts

    A UK application filed in May 2025. Its specification is not yet published, so what it covers cannot be described from the public record.

    - **Earliest priority**: May 7, 2025
    - **Inventors**: Not yet published

    No grant yet on the public record.

    #### 1 publication on the record

    | Number | Office | Document | Status | Date |
    | --- | --- | --- | --- | --- |
    | [GB202506945D0 (opens in a new tab)](https://patents.google.com/patent/GB202506945D0/en) | UK | Filing record | Filed, not yet published | May 7, 2025 |
14. Family 13 Post-processing ·

    ### After-treating additively manufactured parts

    A published international application. Its summary was not visible on the public record we checked, so we do not describe it here.

    - **Earliest priority**: —
    - **Inventors**: Not yet published

    No grant yet on the public record.

    #### 1 publication on the record

    | Number | Office | Document | Status | Date |
    | --- | --- | --- | --- | --- |
    | [WO2022018446 (opens in a new tab)](https://patents.google.com/patent/WO2022018446A1/en) | PCT | International application | Published | — |

How we counted

## From the public record, not from us.

Families and publications come from public patent records: Google Patents, PubChem patent records and the European Patent Register, cross-checked against the front pages of 34 published documents. Some registers block automated searches, so the list may be incomplete.

Statuses are as shown on public registers on October 6, 2026. Whether each patent is still in force was not verified. Applications are listed as published; their current status may have changed. This page describes what each invention is about in plain English. It makes no statement about the scope, validity or infringement of any patent, and it is not legal advice.

- [Search Google Patents (opens in a new tab)](https://patents.google.com/?assignee=Additive+Manufacturing+Technologies)
- [European Patent Register (opens in a new tab)](https://register.epo.org/smartSearch?searchMode=smart&query=pa%3D%22additive+manufacturing+technologies%22&lng=en)
- [Espacenet (opens in a new tab)](https://worldwide.espacenet.com/patent/search?q=pa%3D%22Additive%20Manufacturing%20Technologies%22)

Work with the originals

## Send us a part. We’ll send it back vapor smoothed.

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No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks[3]

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## Sources

1. [Raise3D announces partnership with AMT to bring advanced post-processing to RMS220 SLS 3D printer](https://amtechnologies.com/news/raise3d-and-amt-partnership/) · AMT · Apr 2, 2026 · also [3D ADEPT Media](https://3dadept.com/raise3d-and-amt-join-forces-to-deliver-end-to-end-sls-post-processing-in-europe/)
2. [AMT company statement: world's largest installed base of automated vapor smoothing systems; first automated vapor smoothing system for powder-bed parts (PostPro3D); largest patent portfolio in vapor smoothing](https://amtechnologies.com/about/) · AMT · Oct 6, 2026
3. [PostPro benchmarking: send us your 3D printed parts](https://benchmarking.amtechnologies.com/) · AMT · read Oct 6, 2026