Patent No. EP3648939 (titled "Process For Preparing A Polyolefin Composition") was filed by Basell Polyolefine on Aug 30, 2018. The application was issued on Jan 13, 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 |
|---|---|---|
| THE DOW CHEMICAL | Oct 12, 2021 | BOULT WADE TENNANT |
| CHEVRON PHILLIPS CHEMICAL LP | Jul 30, 2021 | POTTER CLARKSON |
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
Jul 16, 2025
Jul 16, 2025
Jul 16, 2025
Jul 16, 2025
Jun 12, 2025
Jun 12, 2025
Jun 12, 2025
Jun 12, 2025
Apr 3, 2025
Apr 3, 2025
Mar 31, 2025
Mar 31, 2025
Mar 31, 2025
Mar 31, 2025
Mar 31, 2025
Mar 12, 2025
Mar 12, 2025
Mar 3, 2025
Feb 28, 2025
Feb 28, 2025
Feb 28, 2025
Jan 29, 2025
Jan 29, 2025
Jan 29, 2025
Jan 29, 2025
Jan 24, 2025
Jan 24, 2025
Jan 24, 2025
Oct 2, 2024
Oct 2, 2024
Sep 26, 2024
Sep 26, 2024
Sep 26, 2024
Sep 26, 2024
Sep 26, 2024
Aug 20, 2024
Aug 20, 2024
Aug 20, 2024
Jun 12, 2024
Jun 12, 2024
Jun 10, 2024
Jun 10, 2024
Jun 10, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Jun 5, 2024
Jun 5, 2024
Mar 21, 2024
Mar 21, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Mar 18, 2024
Nov 20, 2023
Nov 20, 2023
Nov 15, 2023
Nov 15, 2023
Nov 15, 2023
Sep 29, 2023
Sep 29, 2023
Sep 29, 2023
Sep 19, 2023
Sep 19, 2023
Sep 19, 2023
Jul 26, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jun 7, 2023
Jun 7, 2023
Jun 7, 2023
Jun 5, 2023
Jun 5, 2023
Jun 5, 2023
Jun 5, 2023
Jun 5, 2023
Jun 5, 2023
May 24, 2023
May 24, 2023
May 18, 2023
May 18, 2023
May 18, 2023
May 3, 2023
Apr 14, 2023
Apr 14, 2023
Apr 12, 2023
Apr 12, 2023
Apr 5, 2023
Apr 5, 2023
Apr 5, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Apr 4, 2023
Mar 1, 2023
Mar 1, 2023
Feb 22, 2023
Feb 22, 2023
Dec 20, 2022
Dec 15, 2022
Dec 15, 2022
Dec 15, 2022
Nov 23, 2022
Nov 23, 2022
Nov 16, 2022
Nov 16, 2022
Nov 16, 2022
Nov 8, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Nov 7, 2022
Oct 21, 2022
Oct 21, 2022
Oct 18, 2022
Oct 18, 2022
Oct 18, 2022
Oct 18, 2022
Oct 12, 2022
Oct 10, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 7, 2022
Oct 5, 2022
Oct 5, 2022
Sep 26, 2022
Sep 26, 2022
Sep 26, 2022
Sep 26, 2022
Sep 24, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Sep 23, 2022
Jun 24, 2022
Jun 24, 2022
Jun 21, 2022
Jun 21, 2022
Jun 21, 2022
Mar 9, 2022
Mar 9, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Mar 3, 2022
Oct 25, 2021
Oct 25, 2021
Oct 25, 2021
Oct 18, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Oct 12, 2021
Aug 5, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
Jan 25, 2021
Dec 17, 2020
Dec 3, 2020
Dec 3, 2020
Dec 3, 2020
Dec 3, 2020
Nov 30, 2020
Nov 30, 2020
Nov 30, 2020
Nov 30, 2020
Nov 30, 2020
Oct 27, 2020
Oct 27, 2020
Oct 27, 2020
Oct 27, 2020
Sep 28, 2020
Sep 28, 2020
Sep 28, 2020
Sep 28, 2020
Sep 28, 2020
Aug 7, 2020
Jun 23, 2020
Jun 15, 2020
Jun 15, 2020
Jun 15, 2020
Jun 3, 2020
May 22, 2020
May 22, 2020
May 22, 2020
May 22, 2020
May 22, 2020
Apr 16, 2020
Mar 17, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Feb 6, 2020
Feb 4, 2020
Feb 4, 2020
Jan 10, 2020
Mar 27, 2019
Mar 7, 2019
Mar 7, 2019
Jan 2, 2019
Jan 2, 2019
Jan 2, 2019
Sep 5, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018
Aug 30, 2018