Patent No. EP3636879 (titled "Vacuum Pump") was filed by Pfeiffer Vacuum on Nov 20, 2019. The application was issued on Jan 5, 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 |
|---|---|---|
| DVP VACUUM TECHNOLOGY | Oct 5, 2022 | CASADEI |
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
Sep 5, 2025
Sep 3, 2025
Sep 3, 2025
Jul 24, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 18, 2025
Jul 3, 2025
Jun 3, 2025
Jun 3, 2025
May 27, 2025
May 27, 2025
May 27, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Apr 7, 2025
Mar 14, 2025
Mar 13, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Jan 16, 2025
Jan 16, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jan 13, 2025
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Jun 3, 2024
Mar 6, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Feb 27, 2023
Nov 10, 2022
Nov 10, 2022
Nov 4, 2022
Nov 4, 2022
Nov 4, 2022
Oct 20, 2022
Oct 20, 2022
Oct 20, 2022
Oct 19, 2022
Oct 19, 2022
Oct 17, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Oct 5, 2022
Jan 18, 2022
Dec 9, 2021
Oct 14, 2021
Oct 14, 2021
Oct 14, 2021
Oct 14, 2021
Oct 14, 2021
Jul 7, 2021
Jul 7, 2021
Jul 7, 2021
Jul 7, 2021
Jul 7, 2021
Sep 16, 2020
Sep 10, 2020
Sep 10, 2020
Aug 3, 2020
Jul 17, 2020
Jul 17, 2020
Jul 17, 2020
Jul 17, 2020
Jul 17, 2020
Jul 17, 2020
Jul 17, 2020
Apr 20, 2020
Mar 18, 2020
Mar 12, 2020
Mar 12, 2020
Mar 12, 2020
Mar 12, 2020
Mar 3, 2020
Jan 13, 2020
Nov 21, 2019
Nov 20, 2019
Nov 20, 2019
Nov 20, 2019
Nov 20, 2019
Nov 20, 2019
Nov 20, 2019
Nov 20, 2019