Patent No. EP3646811 (titled "Replaceable Nozzle Tip For A Dental Powder Jet Device") was filed by DRR Dental on Oct 24, 2019. The application was issued on Dec 4, 2024.

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 |
|---|---|---|
| FERTON HOLDING | Sep 4, 2025 | MULLER SCHUPFNER & PARTNER PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB MUC |
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
Sep 2, 2026
Sep 2, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Aug 28, 2026
Apr 24, 2026
Apr 24, 2026
Apr 20, 2026
Apr 15, 2026
Apr 15, 2026
Apr 15, 2026
Mar 4, 2026
Mar 4, 2026
Mar 4, 2026
Mar 4, 2026
Mar 4, 2026
Jan 27, 2026
Jan 22, 2026
Jan 22, 2026
Jan 22, 2026
Nov 17, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Sep 18, 2025
Sep 18, 2025
Sep 9, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Sep 4, 2025
Dec 17, 2024
Nov 7, 2024
Oct 16, 2024
Oct 11, 2024
Oct 11, 2024
Oct 11, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 21, 2024
Jun 12, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Jun 7, 2024
Feb 12, 2024
Feb 12, 2024
Feb 12, 2024
Feb 12, 2024
Feb 12, 2024
Feb 12, 2024
Oct 20, 2023
Oct 20, 2023
Oct 16, 2023
Oct 13, 2023
Oct 9, 2023
Oct 9, 2023
Oct 9, 2023
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
Dec 15, 2022
Dec 15, 2022
Dec 5, 2022
Sep 27, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Feb 3, 2022
Feb 3, 2022
Dec 7, 2021
Dec 9, 2020
Dec 9, 2020
Dec 9, 2020
Dec 9, 2020
Dec 9, 2020
Dec 9, 2020
Dec 9, 2020
Jul 27, 2020
Jun 24, 2020
Jun 24, 2020
Jun 24, 2020
Jun 24, 2020
Apr 8, 2020
Feb 21, 2020
Feb 21, 2020
Feb 21, 2020
Feb 21, 2020
Feb 11, 2020
Dec 17, 2019
Dec 17, 2019
Dec 17, 2019
Dec 17, 2019
Nov 6, 2019
Nov 6, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019