The weekly litigation news digest is live. Subscribe now
Patent No. EP3381942 (titled "A Method For Treating Melanoma Using A Herpes Simplex Virus And An Immune Checkpoint Inhibitor") was filed by Amgen on Aug 30, 2013. The application was issued on Oct 1, 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 |
|---|---|---|
| HOFFMANN EITLE | Jan 13, 2022 | - |
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 4, 2025
Aug 26, 2025
Aug 26, 2025
Aug 26, 2025
Aug 26, 2025
Jun 20, 2025
Jun 20, 2025
Jun 11, 2025
May 14, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Jan 22, 2025
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 19, 2024
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 6, 2023
Sep 6, 2023
Aug 31, 2023
Aug 31, 2023
Aug 31, 2023
Jun 17, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Jun 13, 2022
Feb 3, 2022
Feb 3, 2022
Jan 28, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Jan 13, 2022
Apr 28, 2021
Mar 23, 2021
Mar 18, 2021
Mar 16, 2021
Mar 16, 2021
Mar 16, 2021
Mar 3, 2021
Mar 3, 2021
Mar 3, 2021
Mar 3, 2021
Jan 20, 2021
Jan 20, 2021
Jan 20, 2021
Jan 20, 2021
Jan 20, 2021
Nov 9, 2020
Nov 5, 2020
Nov 4, 2020
Nov 4, 2020
Nov 4, 2020
Nov 4, 2020
Nov 4, 2020
Nov 4, 2020
Nov 4, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
Oct 9, 2020
May 7, 2020
May 7, 2020
Feb 3, 2020
Feb 3, 2020
Feb 3, 2020
Dec 11, 2019
Dec 4, 2019
Jul 25, 2019
Jul 25, 2019
Jul 18, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Apr 3, 2019
Oct 8, 2018
Sep 5, 2018
Jul 4, 2018
Jun 27, 2018
Jun 25, 2018
Jun 20, 2018
Jun 20, 2018
Jun 20, 2018
Jun 20, 2018
Jun 14, 2018
Jun 8, 2018
May 31, 2018
May 23, 2018
May 23, 2018
May 23, 2018
May 23, 2018
Apr 16, 2018
Apr 16, 2018
Mar 14, 2018
Feb 21, 2018
Feb 21, 2018
Feb 21, 2018
Feb 21, 2018
Feb 21, 2018
Mar 25, 2014
Mar 25, 2014