Patent No. EP3246047 (titled "Combination Drug") was filed by Chugai Seiyaku Kabushiki Kaisha on Jan 15, 2016. The application was issued on Dec 25, 2024.

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 |
|---|---|---|
| BOTTI & FERRARI | Sep 24, 2025 | BOTTI & FERRARI |
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
May 29, 2026
May 29, 2026
Feb 23, 2026
Feb 23, 2026
Feb 19, 2026
Feb 16, 2026
Feb 16, 2026
Feb 16, 2026
Oct 10, 2025
Oct 10, 2025
Sep 30, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Jan 10, 2025
Nov 28, 2024
Nov 15, 2024
Nov 15, 2024
Nov 15, 2024
Sep 30, 2024
Sep 30, 2024
Sep 30, 2024
Sep 30, 2024
Sep 30, 2024
Sep 30, 2024
Sep 5, 2024
Sep 5, 2024
Sep 5, 2024
Sep 5, 2024
Sep 5, 2024
Sep 5, 2024
Sep 5, 2024
May 7, 2024
May 7, 2024
May 7, 2024
May 7, 2024
May 7, 2024
May 7, 2024
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Jul 19, 2023
Jul 13, 2023
Jul 13, 2023
Jul 13, 2023
May 8, 2023
May 8, 2023
Jun 10, 2021
Jun 10, 2021
Jun 10, 2021
Jun 10, 2021
Jun 10, 2021
Apr 26, 2021
Apr 20, 2021
Apr 20, 2021
Apr 20, 2021
Feb 16, 2021
Feb 16, 2021
May 22, 2020
May 22, 2020
May 22, 2020
May 22, 2020
May 22, 2020
May 22, 2020
Mar 31, 2020
Mar 23, 2020
Nov 15, 2019
Nov 15, 2019
Nov 11, 2019
Feb 20, 2019
Feb 20, 2019
Feb 20, 2019
Aug 10, 2018
Jul 25, 2018
Jul 25, 2018
Jul 25, 2018
Jul 25, 2018
Jun 29, 2018
Mar 12, 2018
Mar 12, 2018
Mar 12, 2018
Mar 12, 2018
Mar 12, 2018
Mar 7, 2018
Mar 7, 2018
Mar 7, 2018
Oct 25, 2017
Sep 1, 2017
Aug 21, 2017
Aug 21, 2017
Aug 1, 2017
Aug 1, 2017
Jun 19, 2017
Jun 19, 2017
Jun 19, 2017
Jun 19, 2017
Jun 19, 2017
Jun 19, 2017
Jun 19, 2017
May 29, 2017
Aug 8, 2016
Jul 21, 2016
Jul 21, 2016
Jul 21, 2016
Jul 21, 2016