Patent No. EP3272798 (titled "Polyamide Resin Foam-Molded Article And Method For Producing Polyamide Resin Foam-Molded Article") was filed by Asahi Kasei Kabushiki Kaisha on Mar 1, 2016. The application was issued on Apr 19, 2023.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| EVONIK OPERATIONS | Jan 19, 2024 | F & E PATENT |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
Get instant alerts for new documents
Sep 1, 2025
Sep 1, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 26, 2025
May 15, 2025
May 15, 2025
May 9, 2025
May 8, 2025
May 8, 2025
May 8, 2025
Apr 10, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Mar 27, 2025
Mar 21, 2025
Mar 21, 2025
Mar 21, 2025
Jul 2, 2024
Jul 2, 2024
Jul 2, 2024
Jul 2, 2024
Jul 2, 2024
Jul 2, 2024
Jul 2, 2024
Jun 6, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Mar 13, 2024
Feb 2, 2024
Feb 2, 2024
Jan 25, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
May 4, 2023
Mar 23, 2023
Mar 15, 2023
Mar 14, 2023
Mar 9, 2023
Mar 9, 2023
Mar 9, 2023
Mar 9, 2023
Jan 12, 2023
Nov 10, 2022
Nov 10, 2022
Nov 10, 2022
Nov 10, 2022
Nov 10, 2022
Aug 31, 2022
Aug 31, 2022
Aug 31, 2022
Apr 26, 2021
Apr 15, 2021
Apr 15, 2021
Apr 15, 2021
Apr 15, 2021
Apr 15, 2021
Apr 15, 2021
Apr 15, 2021
Apr 15, 2021
Feb 5, 2021
Dec 18, 2020
Dec 8, 2020
Dec 1, 2020
Dec 1, 2020
Dec 1, 2020
Dec 1, 2020
Dec 1, 2020
Oct 20, 2020
Oct 20, 2020
Oct 20, 2020
Oct 8, 2020
Oct 1, 2020
Oct 1, 2020
Aug 31, 2020
Aug 31, 2020
Aug 31, 2020
Jun 5, 2020
Jun 5, 2020
May 19, 2020
May 19, 2020
May 19, 2020
May 19, 2020
May 19, 2020
May 19, 2020
May 19, 2020
May 19, 2020
Apr 1, 2020
Mar 25, 2020
Mar 25, 2020
Nov 27, 2019
Nov 27, 2019
Sep 27, 2019
Sep 27, 2019
Sep 27, 2019
Sep 27, 2019
Jul 25, 2019
Jul 18, 2019
Jul 18, 2019
Mar 20, 2019
Mar 20, 2019
Mar 8, 2019
Mar 8, 2019
Mar 8, 2019
Mar 8, 2019
Mar 8, 2019
Mar 8, 2019
Mar 8, 2019
Nov 7, 2018
Nov 7, 2018
Oct 17, 2018
Oct 17, 2018
Oct 17, 2018
Oct 17, 2018
Oct 17, 2018
Oct 17, 2018
Oct 17, 2018
Jun 8, 2018
Jun 8, 2018
May 11, 2018
May 11, 2018
May 11, 2018
Jan 16, 2018
Jan 16, 2018
Jan 4, 2018
Nov 9, 2017
Nov 9, 2017
Nov 9, 2017
Oct 27, 2017
Oct 23, 2017
Oct 23, 2017
Oct 2, 2017
Oct 2, 2017
Sep 8, 2017
Sep 8, 2017
Sep 8, 2017
Sep 8, 2017
Sep 8, 2017
Jul 26, 2017
Oct 12, 2016
Sep 22, 2016
Sep 22, 2016
Sep 22, 2016