Patent No. EP3439637 (titled "Process For Mesalazine Solid Formulations") was filed by Alfasigma on Apr 4, 2017. The application was issued on Jul 30, 2025.

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 |
|---|---|---|
| ELKINGTON AND FIFE | Feb 22, 2023 | ELKINGTON AND FIFE |
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
Jul 3, 2025
Jul 3, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Apr 15, 2025
Apr 14, 2025
Apr 14, 2025
Apr 14, 2025
Apr 11, 2025
Apr 11, 2025
Apr 8, 2025
Apr 8, 2025
Apr 4, 2025
Apr 4, 2025
Apr 4, 2025
Mar 3, 2025
Mar 3, 2025
Feb 5, 2025
Feb 5, 2025
Feb 5, 2025
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Nov 12, 2024
Sep 12, 2024
Sep 9, 2024
Sep 9, 2024
Sep 9, 2024
Apr 15, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Apr 10, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Feb 12, 2024
Feb 12, 2024
Feb 8, 2024
Feb 8, 2024
Feb 8, 2024
Feb 8, 2024
Feb 8, 2024
Feb 8, 2024
Feb 8, 2024
Feb 5, 2024
Dec 18, 2023
Dec 12, 2023
Dec 12, 2023
Nov 21, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Nov 16, 2023
Sep 25, 2023
Sep 25, 2023
Sep 21, 2023
Sep 21, 2023
Sep 21, 2023
Sep 20, 2023
Sep 20, 2023
Sep 20, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Aug 4, 2023
Aug 1, 2023
Aug 1, 2023
Aug 1, 2023
Aug 1, 2023
Aug 1, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 3, 2023
Jul 3, 2023
Jul 3, 2023
Jun 27, 2023
Jun 27, 2023
Jun 27, 2023
May 24, 2023
May 24, 2023
May 19, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 4, 2023
Apr 28, 2023
Apr 28, 2023
Apr 28, 2023
Apr 28, 2023
Apr 28, 2023
Apr 14, 2023
Apr 14, 2023
Apr 14, 2023
Apr 14, 2023
Apr 14, 2023
Apr 14, 2023
Apr 14, 2023
Mar 16, 2023
Mar 16, 2023
Feb 28, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Feb 22, 2023
Jun 14, 2022
May 6, 2022
Apr 1, 2022
Apr 1, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Nov 18, 2021
Oct 19, 2021
Oct 19, 2021
Oct 19, 2021
Oct 7, 2021
Jul 29, 2021
Jul 16, 2021
Jul 16, 2021
Jul 16, 2021
Mar 11, 2020
Mar 11, 2020
Mar 5, 2020
Mar 5, 2020
Mar 5, 2020
Mar 5, 2020
May 20, 2019
May 20, 2019
May 20, 2019
May 20, 2019
May 20, 2019
Feb 26, 2019
Feb 13, 2019
Jan 16, 2019
Nov 13, 2018
Nov 9, 2018
Nov 6, 2018
Oct 24, 2018
Oct 5, 2018
Sep 27, 2018
Sep 27, 2018
Aug 20, 2018
Oct 30, 2017
Oct 12, 2017
Oct 12, 2017
Jul 5, 2017
Jul 4, 2017
Jul 4, 2017
Jul 4, 2017
Jun 9, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017