Patent No. EP3319948 (titled "Acesulfame Potassium Compositions And Processes For Producing Same") was filed by Celanese on Sep 14, 2017. The application was issued on Jun 30, 2021.

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 |
|---|---|---|
| AECHTER | Mar 29, 2022 | TER MEER STEINMEISTER & PARTNER |
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
Oct 15, 2025
Oct 15, 2025
Oct 15, 2025
Aug 4, 2025
Aug 4, 2025
Aug 4, 2025
Jun 27, 2025
Jun 25, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Jun 20, 2025
Jun 20, 2025
Jun 20, 2025
Jun 20, 2025
Jun 16, 2025
Jun 16, 2025
Jun 16, 2025
May 28, 2025
May 23, 2025
May 23, 2025
May 23, 2025
May 23, 2025
May 23, 2025
Dec 19, 2024
Dec 19, 2024
Dec 16, 2024
Dec 16, 2024
Oct 1, 2024
Sep 25, 2024
Sep 25, 2024
Sep 25, 2024
Jul 10, 2024
Jul 5, 2024
Jul 5, 2024
Jul 5, 2024
Mar 7, 2024
Mar 5, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Feb 29, 2024
Dec 8, 2023
Dec 8, 2023
Dec 5, 2023
Dec 5, 2023
Dec 5, 2023
Nov 6, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Sep 20, 2023
Jul 28, 2023
Jul 24, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 18, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Dec 16, 2022
Dec 16, 2022
Nov 28, 2022
Nov 18, 2022
Nov 18, 2022
Nov 18, 2022
Nov 18, 2022
Nov 18, 2022
Nov 18, 2022
Nov 18, 2022
Aug 26, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Aug 22, 2022
Apr 13, 2022
Apr 13, 2022
Apr 5, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Mar 29, 2022
Jul 13, 2021
Jun 4, 2021
May 28, 2021
May 21, 2021
May 21, 2021
May 21, 2021
May 21, 2021
May 21, 2021
Apr 8, 2021
Apr 8, 2021
Apr 8, 2021
Apr 8, 2021
Apr 8, 2021
Apr 8, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 25, 2021
Mar 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Feb 15, 2021
Nov 2, 2020
Oct 29, 2020
Oct 29, 2020
Oct 29, 2020
Jul 28, 2020
Jul 28, 2020
Jul 28, 2020
Mar 20, 2020
Mar 20, 2020
Jan 27, 2020
Jan 27, 2020
Jan 27, 2020
Jan 27, 2020
Jan 27, 2020
Sep 17, 2019
Sep 17, 2019
Aug 6, 2019
Aug 6, 2019
Aug 6, 2019
Apr 11, 2019
Mar 27, 2019
Mar 27, 2019
Feb 13, 2019
Feb 13, 2019
Feb 13, 2019
Feb 13, 2019
Feb 13, 2019
Oct 12, 2018
Oct 12, 2018
Oct 5, 2018
Jun 6, 2018
May 25, 2018
May 25, 2018
May 25, 2018
May 25, 2018
May 25, 2018
Apr 18, 2018
Apr 18, 2018
Apr 18, 2018
Mar 29, 2018
Mar 29, 2018
Jan 31, 2018
Jan 31, 2018
Jan 31, 2018
Jan 31, 2018
Dec 14, 2017
Dec 12, 2017
Nov 30, 2017
Nov 28, 2017
Nov 28, 2017
Nov 28, 2017
Nov 27, 2017
Nov 9, 2017
Nov 8, 2017
Nov 8, 2017
Nov 8, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 25, 2017
Oct 9, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017