Patent No. EP3944890 (titled "Method And System For Pretreatment Of Gaseous Effluent For Capturing Post-Combustion Co2") was filed by IFP Energies Nouvelles on Jul 15, 2021. The application was issued on Sep 6, 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 |
|---|---|---|
| MITSUBISHI HEAVY INDUSTRIES | Jun 5, 2024 | CABINET BEAU DE LOMENIE |
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
Apr 20, 2026
Apr 16, 2026
Apr 16, 2026
Apr 15, 2026
Apr 13, 2026
Mar 31, 2026
Mar 31, 2026
Mar 31, 2026
Mar 3, 2026
Feb 19, 2026
Feb 19, 2026
Feb 13, 2026
Feb 13, 2026
Feb 13, 2026
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Dec 16, 2025
Oct 23, 2025
Oct 21, 2025
Oct 17, 2025
Oct 17, 2025
Oct 17, 2025
Oct 16, 2025
Sep 25, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Aug 29, 2025
Aug 22, 2025
Aug 22, 2025
Aug 22, 2025
Aug 22, 2025
Aug 22, 2025
Aug 22, 2025
Aug 22, 2025
Aug 22, 2025
Jul 31, 2025
Jul 29, 2025
Jul 29, 2025
Feb 10, 2025
Feb 10, 2025
Feb 10, 2025
Feb 10, 2025
Feb 10, 2025
Feb 10, 2025
Feb 10, 2025
Oct 24, 2024
Oct 18, 2024
Oct 18, 2024
Oct 18, 2024
Oct 18, 2024
Oct 18, 2024
Oct 18, 2024
Oct 18, 2024
Sep 20, 2024
Sep 20, 2024
Sep 20, 2024
Sep 12, 2024
Sep 12, 2024
Sep 12, 2024
Sep 12, 2024
Jun 20, 2024
Jun 20, 2024
Jun 10, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
Sep 19, 2023
Aug 10, 2023
Jul 18, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Mar 27, 2023
Nov 21, 2022
Nov 21, 2022
Nov 21, 2022
Nov 21, 2022
Nov 21, 2022
Nov 21, 2022
Nov 21, 2022
Sep 2, 2022
Sep 2, 2022
Aug 25, 2022
Jun 8, 2022
Jun 8, 2022
Jun 8, 2022
Jun 8, 2022
Jun 8, 2022
Feb 7, 2022
Jan 5, 2022
Dec 9, 2021
Dec 6, 2021
Dec 6, 2021
Dec 6, 2021
Dec 6, 2021
Aug 18, 2021
Jul 19, 2021
Jul 15, 2021
Jul 15, 2021
Jul 15, 2021
Jul 15, 2021
Jul 15, 2021
Jul 15, 2021
Jul 15, 2021
Jul 15, 2021