Patent No. EP3762525 (titled "Solvent-Spun Cellulosic Fibre") was filed by Lenzing on Mar 5, 2019. The application was issued on Aug 7, 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 |
|---|---|---|
| METSA SPRING | May 7, 2025 | SEPPO LAINE |
| TABUJEW | May 6, 2025 | TABUJEW |
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
Oct 15, 2026
Oct 15, 2026
Oct 14, 2026
Oct 14, 2026
Oct 14, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 23, 2026
Sep 10, 2026
Sep 7, 2026
Sep 7, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Sep 3, 2026
Aug 25, 2026
Aug 25, 2026
Aug 21, 2026
Aug 21, 2026
Aug 21, 2026
Jul 17, 2026
Jul 13, 2026
Jul 13, 2026
Jul 10, 2026
Jul 10, 2026
Jul 10, 2026
Jul 10, 2026
Jul 10, 2026
Jul 10, 2026
Jul 10, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 9, 2026
Jul 8, 2026
Jul 8, 2026
Jul 8, 2026
Dec 22, 2025
Dec 22, 2025
Dec 22, 2025
Dec 22, 2025
Dec 22, 2025
Dec 22, 2025
Sep 25, 2025
Sep 25, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
May 22, 2025
May 22, 2025
May 22, 2025
May 12, 2025
May 12, 2025
May 12, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 7, 2025
May 6, 2025
May 6, 2025
May 6, 2025
May 6, 2025
May 6, 2025
May 6, 2025
May 6, 2025
Aug 21, 2024
Jul 11, 2024
Jun 27, 2024
Jun 27, 2024
Jun 27, 2024
Jun 27, 2024
Jun 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Feb 22, 2024
Apr 13, 2021
Apr 13, 2021
Apr 13, 2021
Apr 13, 2021
Apr 13, 2021
Apr 13, 2021
Apr 13, 2021
Dec 16, 2020
Oct 13, 2020
Oct 9, 2020
Oct 9, 2020
Oct 6, 2020
Sep 25, 2020
Sep 25, 2020
Sep 21, 2020
Jul 17, 2020
Oct 2, 2019
Sep 12, 2019
Sep 12, 2019
Jul 4, 2019
May 21, 2019
Mar 13, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019
Mar 5, 2019