Patent No. EP3859944 (titled "Fixing Resin Composition For Use In Rotor") was filed by Sumitomo Bakelite on Aug 29, 2011. The application was issued on Jun 28, 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.
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
Dec 22, 2025
Dec 22, 2025
Dec 18, 2025
Dec 16, 2025
Dec 15, 2025
Dec 15, 2025
Dec 15, 2025
Dec 15, 2025
Dec 15, 2025
Dec 15, 2025
Dec 15, 2025
Nov 19, 2025
Nov 19, 2025
Nov 19, 2025
Nov 19, 2025
Nov 14, 2025
Nov 13, 2025
Nov 13, 2025
Nov 13, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 1, 2025
Sep 29, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 19, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Aug 5, 2025
Aug 5, 2025
Jul 31, 2025
Jul 31, 2025
Jul 31, 2025
Jul 31, 2025
Jul 31, 2025
Jul 30, 2025
Jul 30, 2025
Jul 30, 2025
Jul 30, 2025
Jul 30, 2025
Dec 9, 2024
Dec 9, 2024
Dec 9, 2024
Dec 9, 2024
Dec 9, 2024
Aug 16, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Aug 12, 2024
Apr 16, 2024
Apr 16, 2024
Apr 12, 2024
Apr 4, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Jul 11, 2023
Jun 2, 2023
May 23, 2023
May 23, 2023
May 23, 2023
May 23, 2023
May 23, 2023
Jan 23, 2023
Jan 23, 2023
Jan 23, 2023
Jan 23, 2023
Jan 23, 2023
Jan 23, 2023
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Jun 28, 2022
Jun 28, 2022
May 18, 2022
May 13, 2022
Apr 26, 2022
Apr 26, 2022
Apr 26, 2022
Apr 26, 2022
Apr 26, 2022
Apr 26, 2022
Apr 26, 2022
Mar 30, 2022
Mar 30, 2022
Mar 22, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Aug 9, 2021
Jul 7, 2021
Jun 18, 2021
Jun 15, 2021
Jun 15, 2021
Jun 15, 2021
Jun 15, 2021
Jun 7, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 22, 2021
Mar 26, 2012