Patent No. EP3752283 (titled "Superior Core-In-Shell Component Composite Adsorbents For Vsa/Vpsa/Psa Systems") was filed by Praxair Technology on Feb 14, 2019. The application was issued on Apr 27, 2022.

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 |
|---|---|---|
| LAIR LIQUIDE | Jan 26, 2023 | AIR LIQUIDE |
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
Oct 9, 2025
Oct 9, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jul 4, 2025
Jun 12, 2025
Apr 23, 2025
Apr 16, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Apr 9, 2025
Apr 9, 2025
Apr 9, 2025
Dec 9, 2024
Dec 9, 2024
Dec 9, 2024
Dec 9, 2024
Dec 9, 2024
Oct 6, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 12, 2023
Jun 27, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Mar 6, 2023
Mar 6, 2023
Mar 6, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 14, 2023
Feb 10, 2023
Feb 10, 2023
Feb 6, 2023
Feb 3, 2023
Jan 27, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
May 11, 2022
Mar 31, 2022
Feb 17, 2022
Feb 9, 2022
Feb 9, 2022
Feb 9, 2022
Feb 9, 2022
Feb 9, 2022
Feb 9, 2022
Jan 27, 2022
Jan 27, 2022
Jan 27, 2022
Jan 27, 2022
Nov 29, 2021
Nov 26, 2021
Nov 15, 2021
Oct 27, 2021
Oct 27, 2021
Oct 27, 2021
Oct 27, 2021
Oct 27, 2021
Oct 19, 2021
Oct 14, 2021
Oct 14, 2021
Oct 14, 2021
Oct 14, 2021
Sep 21, 2021
Sep 21, 2021
Sep 21, 2021
Sep 21, 2021
Sep 21, 2021
Sep 21, 2021
Sep 21, 2021
May 14, 2021
May 14, 2021
May 7, 2021
Mar 15, 2021
Mar 15, 2021
Mar 15, 2021
Mar 15, 2021
Mar 15, 2021
Mar 15, 2021
Mar 15, 2021
Nov 25, 2020
Sep 22, 2020
Sep 18, 2020
Sep 18, 2020
Sep 18, 2020
Sep 18, 2020
Aug 31, 2020
Aug 17, 2020
Aug 17, 2020
Jun 26, 2020
Sep 10, 2019
Aug 22, 2019
Aug 22, 2019
May 15, 2019
May 15, 2019
May 15, 2019
May 15, 2019
Mar 21, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019