Patent No. EP3622980 (titled "Blood Purification Device") was filed by Nikkiso on May 30, 2018. The application was issued on Jun 7, 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 |
|---|---|---|
| B BRAUN AVITUM | Mar 7, 2024 | WINTER |
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
Feb 6, 2026
Feb 6, 2026
Feb 6, 2026
Oct 27, 2025
Oct 27, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 20, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Aug 21, 2025
Aug 21, 2025
Aug 21, 2025
Aug 21, 2025
Aug 18, 2025
Aug 18, 2025
Aug 18, 2025
Aug 18, 2025
Aug 18, 2025
Aug 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 18, 2025
Jun 3, 2025
May 7, 2025
Apr 29, 2025
Apr 29, 2025
Apr 29, 2025
Apr 1, 2025
Mar 27, 2025
Mar 27, 2025
Mar 27, 2025
Mar 27, 2025
Mar 27, 2025
Jan 24, 2025
Jan 21, 2025
Jan 21, 2025
Jan 21, 2025
Jan 21, 2025
Nov 20, 2024
Nov 14, 2024
Nov 14, 2024
Nov 14, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Oct 25, 2024
Aug 12, 2024
Aug 7, 2024
Aug 7, 2024
Aug 7, 2024
Jul 26, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Jul 22, 2024
Mar 20, 2024
Mar 20, 2024
Mar 13, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Jun 20, 2023
May 11, 2023
Apr 28, 2023
Apr 28, 2023
Apr 28, 2023
Apr 28, 2023
Apr 28, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Jan 26, 2023
Dec 23, 2022
Sep 15, 2022
Sep 2, 2022
Sep 2, 2022
Sep 2, 2022
Jul 16, 2021
Jul 16, 2021
Jul 16, 2021
Feb 16, 2021
Jan 28, 2021
Jan 28, 2021
Jan 28, 2021
Jan 28, 2021
Jan 18, 2021
Feb 19, 2020
Jan 3, 2020
Jan 2, 2020
Jan 2, 2020
Dec 20, 2019
Dec 20, 2019
Dec 20, 2019
Dec 17, 2019
Dec 17, 2019
Dec 12, 2019
Dec 11, 2019
Dec 11, 2019
Dec 11, 2019
Dec 11, 2019
Dec 11, 2019
Dec 11, 2019
Oct 11, 2019
Jan 9, 2019
Dec 6, 2018
Dec 6, 2018
Dec 6, 2018