Patent No. EP3600907 (titled "Method For Producing A Multilayer Film And Multilayer Film As Well As A Security Element And A Security Document") was filed by Leonhard Kurz Stiftung on Mar 26, 2018. The application was issued on Jun 14, 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 |
|---|---|---|
| GIESECKEDEVRIENT CURRENCY TECHNOLOGY | Mar 14, 2024 | PATENTANWALTE GEYER |
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
Jan 16, 2026
Jan 13, 2026
Jan 13, 2026
Jan 13, 2026
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Nov 20, 2025
Oct 8, 2025
Aug 13, 2025
Aug 13, 2025
Aug 7, 2025
Aug 7, 2025
Aug 7, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Nov 11, 2024
Nov 6, 2024
Oct 28, 2024
Oct 28, 2024
Oct 28, 2024
Oct 28, 2024
Oct 28, 2024
Jul 30, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Jul 25, 2024
Mar 28, 2024
Mar 28, 2024
Mar 19, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Mar 14, 2024
Jun 27, 2023
May 19, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Oct 11, 2021
Oct 11, 2021
Oct 11, 2021
Oct 11, 2021
Oct 11, 2021
Oct 11, 2021
Oct 11, 2021
Jun 17, 2021
Jun 17, 2021
Feb 11, 2021
Feb 11, 2021
Feb 11, 2021
Feb 11, 2021
Feb 11, 2021
Oct 6, 2020
Oct 6, 2020
Aug 11, 2020
Aug 11, 2020
Aug 11, 2020
Aug 11, 2020
Aug 11, 2020
Aug 11, 2020
Aug 11, 2020
Apr 30, 2020
Apr 30, 2020
Apr 1, 2020
Jan 9, 2020
Nov 4, 2019
Nov 4, 2019
Nov 4, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 24, 2019
Oct 14, 2019
Aug 9, 2019
Oct 24, 2018
Oct 4, 2018
Oct 4, 2018
Oct 4, 2018
Aug 14, 2018
Aug 14, 2018
Aug 14, 2018
Jul 26, 2018
Jul 26, 2018
Jul 26, 2018
Jul 4, 2018
Jul 4, 2018
Apr 13, 2018
Apr 13, 2018
Apr 12, 2018
Apr 9, 2018
Mar 26, 2018
Mar 26, 2018
Mar 26, 2018
Mar 26, 2018
Mar 26, 2018
Mar 26, 2018
Mar 26, 2018