Patent No. EP3351237 (titled "Hyaluronic Acid-Collagen Matrices For Dermal Filling And Volumizing Applications") was filed by Allergan on Nov 2, 2012. The application was issued on Dec 18, 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 |
|---|---|---|
| ZACCO DENMARK | Sep 17, 2025 | ZACCO DENMARK |
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
Feb 5, 2026
Feb 4, 2026
Feb 4, 2026
Feb 4, 2026
Feb 4, 2026
Feb 4, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Feb 2, 2026
Oct 2, 2025
Oct 2, 2025
Oct 1, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 22, 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
Jan 9, 2025
Nov 21, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Jun 4, 2024
Jun 4, 2024
Jun 4, 2024
Jun 4, 2024
Jun 4, 2024
Jun 4, 2024
Nov 2, 2023
Nov 2, 2023
Nov 2, 2023
Oct 31, 2023
Oct 31, 2023
Oct 31, 2023
Oct 31, 2023
Oct 31, 2023
Jul 12, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
May 8, 2023
May 8, 2023
Jun 24, 2022
Jun 24, 2022
Jun 24, 2022
Jun 24, 2022
Jun 24, 2022
Feb 16, 2022
Feb 16, 2022
Feb 10, 2022
May 16, 2019
May 3, 2019
May 3, 2019
May 3, 2019
May 3, 2019
May 3, 2019
Mar 5, 2019
Jan 10, 2019
Jan 10, 2019
Jul 30, 2018
Jun 27, 2018
Jun 18, 2018
Jun 18, 2018
Jun 13, 2018
Jun 1, 2018
May 29, 2018
May 29, 2018
May 29, 2018
May 29, 2018
May 24, 2018
May 15, 2018
Apr 25, 2018
Apr 25, 2018
Apr 23, 2018
Apr 23, 2018
Apr 23, 2018
Feb 28, 2018
Feb 28, 2018
Feb 28, 2018
Feb 28, 2018
Feb 28, 2018
Feb 28, 2018
Feb 28, 2018
May 30, 2013
May 30, 2013
May 30, 2013