Patent No. EP4112794 (titled "Stitched Reinforcing Fiber Base Material, Preform Material, Fiber Reinforced Composite Material, And Manufacturing Methods For Same") was filed by Teijin on Feb 22, 2021. The application was issued on Jul 31, 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 |
|---|---|---|
| TORAY ADVANCED COMPOSITES NETHERLANDS | Apr 24, 2025 | KADOR & PARTNER PARTG MBB |
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 17, 2026
Sep 17, 2026
Sep 15, 2026
Sep 15, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Sep 11, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 6, 2026
Mar 6, 2026
Mar 6, 2026
Mar 3, 2026
Mar 3, 2026
Mar 3, 2026
Dec 23, 2025
Dec 23, 2025
Dec 23, 2025
Dec 23, 2025
Dec 23, 2025
Dec 23, 2025
Sep 19, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
May 16, 2025
May 16, 2025
Apr 29, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Aug 13, 2024
Jul 4, 2024
Jun 20, 2024
Jun 20, 2024
Jun 20, 2024
Jun 20, 2024
Jun 20, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Feb 21, 2024
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Jul 21, 2023
Jul 21, 2023
Jul 7, 2023
Jul 7, 2023
Jul 7, 2023
Jun 23, 2023
Dec 7, 2022
Sep 13, 2022
Sep 13, 2022
Sep 1, 2022
Sep 1, 2022
Sep 1, 2022
Sep 1, 2022
Sep 1, 2022
Jul 8, 2022
Sep 20, 2021
Sep 20, 2021
Sep 2, 2021
Sep 2, 2021
Sep 2, 2021