Patent No. EP4136053 (titled "Revamping Of Ammonia-Urea Plants") was filed by Casale on Apr 7, 2021. The application was issued on Jan 31, 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 |
|---|---|---|
| YARA ASA | Oct 30, 2024 | DE CLERCQ & PARTNERS |
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
Aug 19, 2026
Aug 19, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Aug 14, 2026
Mar 30, 2026
Mar 30, 2026
Mar 30, 2026
Mar 30, 2026
Mar 30, 2026
Mar 26, 2026
Mar 26, 2026
Mar 23, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 18, 2026
Mar 17, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Nov 13, 2024
Nov 13, 2024
Nov 6, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Oct 30, 2024
Feb 13, 2024
Jan 5, 2024
Dec 20, 2023
Dec 20, 2023
Dec 20, 2023
Dec 20, 2023
Dec 20, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Oct 25, 2023
Jan 25, 2023
Nov 24, 2022
Nov 17, 2022
Oct 24, 2022
Oct 24, 2022
Sep 21, 2022
Aug 29, 2022
Aug 29, 2022
Aug 26, 2022
Jul 4, 2022
Jul 4, 2022
Jul 4, 2022
Jul 4, 2022
Jul 4, 2022
May 20, 2022
May 20, 2022
May 20, 2022
Apr 26, 2022
Mar 24, 2022
Feb 24, 2022
Feb 17, 2022
Feb 17, 2022
Feb 17, 2022
Nov 8, 2021
Oct 21, 2021
Oct 21, 2021
Oct 21, 2021
Aug 13, 2021
Aug 11, 2021
Aug 3, 2021
Aug 3, 2021
Aug 3, 2021
Aug 3, 2021
Jun 14, 2021
Jun 8, 2021
Jun 8, 2021
Jun 8, 2021
Jun 8, 2021
Apr 20, 2021
Apr 20, 2021
Apr 16, 2021
Apr 7, 2021
Apr 7, 2021
Apr 7, 2021
Apr 7, 2021
Apr 7, 2021
Apr 7, 2021
Apr 7, 2021