Patent No. EP4158160 (titled "Method And System For Operating A Gas Compressor In An Ammonia And Urea Plant") was filed by Yara ASA on May 26, 2021. The application was issued on Aug 14, 2024.

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 |
|---|---|---|
| STAMICARBON | May 14, 2025 | VO |
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 2, 2026
Jan 2, 2026
Jan 2, 2026
Jan 2, 2026
Jan 2, 2026
Nov 5, 2025
Oct 31, 2025
Oct 31, 2025
Oct 31, 2025
Oct 31, 2025
Oct 31, 2025
Oct 1, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Sep 26, 2025
Jun 13, 2025
Jun 10, 2025
Jun 10, 2025
Jun 10, 2025
Jun 10, 2025
May 28, 2025
May 28, 2025
May 20, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 14, 2025
Aug 27, 2024
Jul 18, 2024
Jul 5, 2024
Jul 5, 2024
Jul 5, 2024
Jul 5, 2024
Jul 5, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Feb 16, 2024
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Oct 24, 2023
Sep 14, 2023
Jun 13, 2023
Jun 13, 2023
Jun 13, 2023
Jun 13, 2023
Jun 13, 2023
Jun 13, 2023
Jun 13, 2023
Mar 9, 2023
Jan 20, 2023
Jan 13, 2023
Dec 21, 2022
Dec 21, 2022
Dec 5, 2022
Dec 5, 2022
Oct 7, 2022
Jun 29, 2022
Jun 29, 2022
Jun 29, 2022
Jun 29, 2022
Jun 29, 2022
Jun 3, 2022
Jun 3, 2022
Jun 3, 2022
Jun 3, 2022
Jun 3, 2022
Apr 14, 2022
Apr 8, 2022
Apr 8, 2022
Apr 8, 2022
Mar 30, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Mar 25, 2022
Dec 20, 2021
Dec 2, 2021
Dec 2, 2021
Jul 1, 2021
Jul 1, 2021
Jul 1, 2021
Jun 21, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021
May 26, 2021