Patent No. EP3663497 (titled "Sealing Device For Sealing Of A Window Frame In The Lower Section Of A Wall Opening") was filed by D&M on Jul 22, 2015. 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 |
|---|---|---|
| PFLUGER TOB THERMISCH OPTIMIERTES BAUZUBEHOR | May 21, 2024 | WITTE |
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
Mar 26, 2026
Mar 20, 2026
Mar 20, 2026
Mar 20, 2026
Feb 27, 2026
Feb 25, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Nov 24, 2025
Oct 21, 2025
Oct 16, 2025
Oct 16, 2025
Oct 16, 2025
Sep 30, 2025
Sep 30, 2025
Sep 23, 2025
Sep 17, 2025
Sep 17, 2025
Sep 17, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Sep 16, 2025
Apr 14, 2025
Nov 18, 2024
Nov 18, 2024
Nov 11, 2024
Nov 11, 2024
Nov 11, 2024
Nov 11, 2024
Nov 11, 2024
Nov 11, 2024
Nov 11, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Nov 8, 2024
Jul 8, 2024
Jul 8, 2024
Jul 5, 2024
Jun 11, 2024
Jun 11, 2024
May 31, 2024
May 28, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
May 21, 2024
Sep 19, 2023
Aug 10, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
May 12, 2023
May 12, 2023
May 12, 2023
May 12, 2023
May 12, 2023
May 12, 2023
Apr 14, 2023
Jul 31, 2020
Jul 3, 2020
Jul 3, 2020
Jul 3, 2020
Jun 16, 2020
May 13, 2020
May 11, 2020
Apr 27, 2020
Apr 27, 2020
Apr 27, 2020
Apr 27, 2020
Apr 27, 2020
Mar 25, 2020
Mar 25, 2020
Mar 11, 2020
Mar 5, 2020
Mar 5, 2020
Mar 5, 2020
Mar 5, 2020
Feb 11, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Jan 31, 2020
Aug 7, 2015