Patent No. EP3731801 (titled "Compositions For Altering The Color Of Hair") was filed by L'Oreal on Dec 28, 2018. The application was issued on Mar 9, 2022.

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.
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
Mar 20, 2025
Mar 20, 2025
Jan 20, 2025
Jan 20, 2025
Jan 20, 2025
Jan 20, 2025
Jan 8, 2025
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Dec 13, 2024
Nov 19, 2024
Sep 25, 2024
Sep 24, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Sep 19, 2024
Apr 4, 2024
Mar 28, 2024
Mar 28, 2024
Mar 28, 2024
Mar 20, 2024
Mar 15, 2024
Mar 15, 2024
Mar 15, 2024
Mar 15, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Apr 28, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Apr 21, 2023
Mar 13, 2023
Mar 6, 2023
Mar 6, 2023
Dec 21, 2022
Dec 21, 2022
Dec 14, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Mar 22, 2022
Feb 10, 2022
Jan 28, 2022
Jan 28, 2022
Jan 28, 2022
Jan 28, 2022
Sep 29, 2021
Sep 29, 2021
Sep 29, 2021
Sep 29, 2021
Sep 29, 2021
Jun 18, 2021
Feb 8, 2021
Feb 8, 2021
Feb 8, 2021
Feb 8, 2021
Feb 8, 2021
Feb 8, 2021
Oct 7, 2020
Aug 7, 2020
Aug 4, 2020
Aug 4, 2020
Aug 4, 2020
Aug 4, 2020
Aug 4, 2020
Jul 28, 2020
Jul 28, 2020
Jul 13, 2020
May 8, 2020
Apr 30, 2020
Apr 30, 2020
Jul 22, 2019
Jul 4, 2019
Jul 4, 2019
Mar 11, 2019
Feb 25, 2019
Feb 22, 2019
Feb 22, 2019
Feb 22, 2019
Feb 11, 2019
Feb 11, 2019
Feb 11, 2019
Feb 11, 2019
Feb 5, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019
Jan 21, 2019