Patent No. EP3630879 (titled "Methods For Improving Color Stability In Polyethylene Resins") was filed by Chevron Phillips Chemical LP on May 22, 2018. The application was issued on Aug 30, 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 |
|---|---|---|
| SABIC SABIC PETROCHEMICALS | May 30, 2024 | - |
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
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 13, 2026
Nov 18, 2025
Nov 18, 2025
Nov 13, 2025
Nov 13, 2025
Nov 13, 2025
Nov 13, 2025
Nov 13, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Oct 31, 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
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 20, 2024
Aug 20, 2024
Aug 20, 2024
Aug 20, 2024
Jun 28, 2024
Jun 28, 2024
Jun 27, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
May 30, 2024
Sep 12, 2023
Aug 3, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Jul 20, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Dec 20, 2022
Mar 17, 2022
Mar 17, 2022
Mar 17, 2022
Mar 17, 2022
Mar 17, 2022
Mar 7, 2022
Mar 7, 2022
Mar 1, 2022
Apr 23, 2020
Apr 23, 2020
Apr 23, 2020
Apr 23, 2020
Apr 23, 2020
Mar 11, 2020
Jan 10, 2020
Jan 8, 2020
Jan 8, 2020
Dec 9, 2019
Nov 12, 2019
Nov 12, 2019
Nov 12, 2019
Oct 7, 2019
Mar 18, 2019
Mar 18, 2019
Dec 21, 2018
Nov 29, 2018
Nov 29, 2018
Oct 12, 2018
Oct 12, 2018
Oct 12, 2018
Sep 25, 2018
Sep 25, 2018
Sep 25, 2018
Sep 25, 2018
Sep 25, 2018
Sep 7, 2018
Sep 6, 2018
Sep 6, 2018
Sep 6, 2018
Jul 16, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018
Jun 12, 2018