Patent No. EP3308774 (titled "Hydroxyalkyl Alkyl Cellulose, Method For Producing The Same, And Solid Preparation") was filed by Shin Etsu Chemical on Oct 6, 2017. 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.
| Company | Opposition Date | Representative |
|---|---|---|
| DUPONT NUTRITION BIOSCIENCES APS | Dec 8, 2022 | F & E PATENT |
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 5, 2025
Feb 27, 2025
Feb 26, 2025
Feb 17, 2025
Feb 14, 2025
Feb 14, 2025
Feb 14, 2025
Feb 6, 2025
Feb 6, 2025
Jan 10, 2025
Jan 10, 2025
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Sep 12, 2024
Aug 20, 2024
Aug 20, 2024
Aug 14, 2024
Aug 13, 2024
Aug 13, 2024
Aug 13, 2024
Jul 15, 2024
Jul 11, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Jul 5, 2024
Jul 5, 2024
Jul 5, 2024
Jul 1, 2024
Jun 26, 2024
Jun 26, 2024
Jun 26, 2024
Jan 23, 2024
Jan 23, 2024
Jan 23, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Jan 19, 2024
Apr 24, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Apr 19, 2023
Mar 21, 2023
Mar 16, 2023
Mar 16, 2023
Mar 16, 2023
Mar 16, 2023
Dec 21, 2022
Dec 21, 2022
Dec 13, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Dec 8, 2022
Jun 7, 2022
Jun 1, 2022
Jun 1, 2022
Jun 1, 2022
Mar 22, 2022
Feb 10, 2022
Feb 9, 2022
Jan 6, 2022
Jan 6, 2022
Jan 6, 2022
Jan 6, 2022
Jan 6, 2022
Oct 13, 2021
Oct 13, 2021
Oct 13, 2021
Oct 13, 2021
Oct 13, 2021
Feb 17, 2020
Feb 17, 2020
Feb 17, 2020
Feb 17, 2020
Feb 17, 2020
Jan 13, 2020
Jan 7, 2020
Jan 7, 2020
Jan 7, 2020
Sep 16, 2019
Sep 16, 2019
Sep 6, 2019
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Apr 23, 2018
Mar 21, 2018
Mar 21, 2018
Mar 21, 2018
Mar 21, 2018
Mar 21, 2018
Mar 8, 2018
Dec 13, 2017
Dec 7, 2017
Dec 7, 2017
Nov 29, 2017
Nov 29, 2017
Nov 29, 2017
Nov 29, 2017
Oct 6, 2017
Oct 6, 2017
Oct 6, 2017
Oct 6, 2017
Oct 6, 2017
Oct 6, 2017
Oct 6, 2017