Patent No. EP3957549 (titled "Reinforcement Structure") was filed by Zephyros on Jul 21, 2017. The application was issued on Feb 28, 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 |
|---|---|---|
| SIKA TECHNOLOGY | Nov 28, 2024 | SIKA PATENT ATTORNEYS |
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 6, 2026
Feb 6, 2026
Feb 6, 2026
Feb 6, 2026
Feb 6, 2026
Jan 30, 2026
Jan 29, 2026
Jan 29, 2026
Jan 29, 2026
Jan 29, 2026
Jan 29, 2026
Dec 12, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 9, 2025
Dec 4, 2025
Dec 1, 2025
Dec 1, 2025
Dec 1, 2025
Sep 17, 2025
Sep 11, 2025
Sep 11, 2025
Sep 1, 2025
Aug 21, 2025
Aug 21, 2025
Aug 21, 2025
Aug 21, 2025
Aug 21, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Apr 14, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Dec 12, 2024
Dec 12, 2024
Dec 5, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Nov 28, 2024
Mar 13, 2024
Feb 1, 2024
Jan 18, 2024
Jan 18, 2024
Jan 18, 2024
Jan 18, 2024
Jan 18, 2024
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Aug 8, 2023
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Feb 28, 2022
Jan 26, 2022
Jan 26, 2022
Jan 26, 2022
Jan 26, 2022
Jan 26, 2022
Jan 20, 2022
Dec 9, 2021
Dec 6, 2021
Sep 6, 2021
Sep 6, 2021
Sep 6, 2021
Sep 6, 2021
Sep 6, 2021
Sep 6, 2021
Sep 6, 2021
Feb 12, 2018