Patent No. EP3898202 (titled "Methods For Low Initial Weld Speed In Ultrasonic Welding") was filed by Dukane IAS on Dec 18, 2019. The application was issued on Apr 17, 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 |
|---|---|---|
| HERRMANN ULTRASCHALLTECHNIK | Jan 16, 2025 | WSL PATENTANWALTE PARTNERSCHAFT MBB |
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 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 23, 2026
Feb 20, 2026
Feb 20, 2026
Feb 20, 2026
Feb 6, 2026
Feb 6, 2026
Feb 6, 2026
Feb 6, 2026
Jan 28, 2026
Jan 28, 2026
Jan 28, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jan 23, 2026
Jul 31, 2025
Jul 31, 2025
Jul 31, 2025
Jul 31, 2025
Jul 31, 2025
Jun 3, 2025
May 28, 2025
May 28, 2025
May 28, 2025
Jan 31, 2025
Jan 31, 2025
Jan 22, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Jan 16, 2025
Apr 30, 2024
Mar 21, 2024
Mar 8, 2024
Mar 8, 2024
Mar 8, 2024
Mar 8, 2024
Mar 8, 2024
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Nov 27, 2023
Oct 27, 2023
Apr 19, 2023
Apr 13, 2023
Apr 13, 2023
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Feb 8, 2022
Oct 27, 2021
Jul 30, 2021
Jul 21, 2021
Jul 21, 2021
Jul 5, 2021
Apr 30, 2021
Jul 13, 2020
Jul 13, 2020
Jun 25, 2020
Jun 25, 2020
Mar 16, 2020
Mar 16, 2020
Mar 16, 2020
Mar 16, 2020
Feb 4, 2020
Jan 19, 2020
Jan 19, 2020
Jan 19, 2020
Jan 19, 2020
Jan 19, 2020
Jan 19, 2020
Jan 19, 2020