Patent No. EP2917266 (titled "Polyarylene Ether Sulfones") was filed by Solvay Specialty Polymers USA on Nov 8, 2013. The application was issued on Aug 19, 2020.

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.
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
Jan 19, 2026
Jan 19, 2026
Jan 19, 2026
Dec 10, 2025
Dec 5, 2025
Dec 5, 2025
Dec 5, 2025
Nov 10, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Nov 4, 2025
Nov 4, 2025
Oct 22, 2025
Oct 22, 2025
Oct 8, 2025
Oct 8, 2025
Sep 22, 2025
Sep 18, 2025
Sep 18, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 12, 2025
Sep 12, 2025
Sep 12, 2025
Jul 29, 2025
Jul 28, 2025
Jul 28, 2025
Jul 28, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 17, 2025
Jul 17, 2025
Feb 14, 2025
Jan 28, 2025
Jan 28, 2025
Jan 24, 2025
Jan 24, 2025
Jan 24, 2025
Jan 24, 2025
Sep 25, 2024
Sep 23, 2024
Sep 23, 2024
Sep 23, 2024
Sep 23, 2024
Sep 23, 2024
Aug 14, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
Aug 8, 2024
May 3, 2024
Apr 29, 2024
Apr 29, 2024
Apr 29, 2024
Apr 12, 2024
Apr 12, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Feb 8, 2024
Feb 8, 2024
Feb 1, 2024
Feb 1, 2024
Feb 1, 2024
Jan 30, 2024
Jan 30, 2024
Jan 24, 2024
Jan 24, 2024
Jan 24, 2024
Dec 22, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 15, 2023
Dec 13, 2023
Dec 13, 2023
Dec 13, 2023
Nov 8, 2023
Oct 31, 2023
Oct 31, 2023
Oct 27, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 20, 2023
Oct 17, 2023
Oct 17, 2023
Oct 17, 2023
Oct 17, 2023
Oct 17, 2023
Oct 17, 2023
Oct 17, 2023
Oct 17, 2023
Oct 10, 2023
Sep 14, 2023
Sep 14, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Dec 9, 2022
Dec 9, 2022
Oct 31, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
Oct 27, 2022
May 3, 2022
Apr 27, 2022
Apr 27, 2022
Apr 27, 2022
Apr 27, 2022
Oct 7, 2021
Oct 1, 2021
Oct 1, 2021
Oct 1, 2021
Oct 1, 2021
Oct 1, 2021
Oct 1, 2021
Oct 1, 2021
Oct 1, 2021
Jun 1, 2021
Jun 1, 2021
May 25, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
May 19, 2021
Aug 31, 2020
Jul 23, 2020
Jul 9, 2020
Jul 9, 2020
Jul 9, 2020
Jul 9, 2020
Jul 9, 2020
Apr 6, 2020
Apr 6, 2020
Apr 6, 2020
Apr 6, 2020
Apr 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Feb 6, 2020
Sep 30, 2019
Sep 30, 2019
Sep 11, 2019
Sep 11, 2019
Sep 11, 2019
Jul 16, 2019
Jul 16, 2019
Jul 1, 2019
Jun 7, 2019
Jun 7, 2019
Jun 7, 2019
Apr 9, 2019
Nov 2, 2018
Nov 2, 2018
Jun 26, 2018
Jan 29, 2016
Jan 27, 2016
Jan 15, 2016
Jan 15, 2016
Jan 15, 2016
Jan 15, 2016
Jan 15, 2016
Aug 19, 2015
Jun 19, 2015
Jun 17, 2015
Jun 17, 2015
Jun 17, 2015
Jun 17, 2015
Jun 17, 2015
Jun 12, 2015
May 27, 2015
Apr 29, 2015
Apr 29, 2015
Mar 20, 2015
Jul 17, 2014
Jul 17, 2014
Jun 4, 2014
Jun 4, 2014
Jun 4, 2014
Jun 3, 2014
Jun 3, 2014
May 15, 2014
Jan 29, 2014
Jan 29, 2014
Nov 8, 2013
Nov 8, 2013
Nov 8, 2013
Nov 8, 2013
Nov 8, 2013