The weekly litigation news digest is live. Subscribe now
Patent No. EP3690189 (titled "Contoured Endwall For A Gas Turbine Engine") was filed by Raytheon on Jan 31, 2020. The application was issued on Apr 5, 2023.

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 |
|---|---|---|
| SAFRAN AIRCRAFT ENGINES | Jan 5, 2024 | CABINET BEAU DE LOMENIE |
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
Dec 1, 2025
Dec 1, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Sep 23, 2025
Jun 11, 2025
Apr 23, 2025
Apr 23, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Nov 26, 2024
Nov 26, 2024
Nov 26, 2024
Nov 26, 2024
Nov 26, 2024
Nov 26, 2024
Nov 26, 2024
Jul 12, 2024
Jul 5, 2024
Jul 5, 2024
Jul 5, 2024
May 28, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
May 20, 2024
Jan 19, 2024
Jan 19, 2024
Jan 10, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Jan 5, 2024
Oct 4, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Apr 18, 2023
Mar 10, 2023
Feb 20, 2023
Feb 20, 2023
Feb 20, 2023
Feb 20, 2023
Oct 10, 2022
Oct 10, 2022
Oct 10, 2022
Oct 10, 2022
Oct 10, 2022
Oct 10, 2022
Sep 20, 2022
Feb 19, 2021
Feb 8, 2021
Feb 8, 2021
Feb 5, 2021
Feb 5, 2021
Feb 5, 2021
Feb 5, 2021
Feb 5, 2021
Feb 5, 2021
Feb 5, 2021
Jan 18, 2021
Dec 18, 2020
Dec 18, 2020
Dec 18, 2020
Sep 4, 2020
Aug 28, 2020
Aug 28, 2020
Aug 17, 2020
Aug 11, 2020
Aug 10, 2020
Jul 8, 2020
May 13, 2020
May 13, 2020
May 13, 2020
May 13, 2020
Apr 30, 2020
Apr 17, 2020
Apr 17, 2020
Apr 17, 2020
Apr 3, 2020
Mar 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020