Patent No. EP3433421 (titled "Method Of Producing A Fibrous Web Containing Natural And Synthetic Fibres") was filed by Paptic on Mar 24, 2017. The application was issued on Jul 14, 2021.

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 |
|---|---|---|
| AHLSTROM OYJ | Apr 13, 2022 | HOFFMANN EITLE |
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 23, 2026
Jan 20, 2026
Jan 20, 2026
Jan 20, 2026
Jan 5, 2026
Jan 5, 2026
Dec 18, 2025
Oct 27, 2025
Oct 27, 2025
Oct 23, 2025
Oct 23, 2025
Oct 22, 2025
Oct 22, 2025
Oct 22, 2025
Oct 22, 2025
Oct 17, 2025
Oct 17, 2025
Oct 14, 2025
Oct 14, 2025
Sep 30, 2025
Sep 30, 2025
Sep 25, 2025
Jun 18, 2025
Jun 13, 2025
Jun 13, 2025
Jun 13, 2025
Apr 16, 2025
Apr 11, 2025
Apr 11, 2025
Apr 11, 2025
Jan 7, 2025
Jan 3, 2025
Dec 27, 2024
Dec 27, 2024
Dec 27, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Dec 20, 2024
Aug 29, 2024
Aug 29, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 26, 2024
Aug 23, 2024
Aug 23, 2024
Aug 23, 2024
Aug 23, 2024
Aug 23, 2024
Jul 1, 2024
Jul 1, 2024
Jul 1, 2024
Jul 1, 2024
Jun 25, 2024
Jun 25, 2024
Jun 25, 2024
Jun 25, 2024
Jun 25, 2024
Jun 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 25, 2024
Apr 22, 2024
Mar 13, 2024
Mar 13, 2024
Jan 19, 2024
Jan 18, 2024
Jan 12, 2024
Jan 12, 2024
Jan 12, 2024
Jan 12, 2024
Jan 12, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jan 11, 2024
Jun 6, 2023
Jun 6, 2023
May 30, 2023
May 30, 2023
Apr 27, 2023
Apr 26, 2023
Apr 26, 2023
Apr 26, 2023
Apr 26, 2023
Apr 26, 2023
Apr 26, 2023
Apr 26, 2023
Dec 2, 2022
Nov 23, 2022
Nov 23, 2022
Nov 23, 2022
Nov 23, 2022
Nov 23, 2022
Nov 23, 2022
Sep 20, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Sep 14, 2022
Jul 13, 2022
Jul 8, 2022
Jul 8, 2022
Jun 29, 2022
Jun 29, 2022
Jun 29, 2022
May 4, 2022
May 4, 2022
Apr 26, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Apr 13, 2022
Jul 27, 2021
Jun 17, 2021
Jun 17, 2021
Jun 7, 2021
Jun 7, 2021
Jun 7, 2021
Jun 7, 2021
Jun 7, 2021
Jan 29, 2021
Jan 29, 2021
Jan 29, 2021
Jan 29, 2021
Jan 29, 2021
Nov 13, 2020
Nov 13, 2020
Nov 13, 2020
Nov 13, 2020
Nov 13, 2020
Sep 21, 2020
Sep 15, 2020
Sep 15, 2020
Jul 13, 2020
Jul 13, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Mar 2, 2020
Feb 25, 2020
Feb 25, 2020
Jan 16, 2020
Nov 4, 2019
Nov 4, 2019
Oct 29, 2019
May 10, 2019
May 10, 2019
May 10, 2019
May 10, 2019
May 10, 2019
Jan 31, 2019
Jan 4, 2019
Oct 31, 2018
Oct 29, 2018
Oct 29, 2018
Oct 29, 2018
Oct 29, 2018
Oct 10, 2018
Sep 5, 2018
Aug 28, 2018
Aug 28, 2018
Aug 28, 2018
Aug 1, 2018
Oct 17, 2017
Sep 28, 2017
Sep 28, 2017
Jul 6, 2017
Jul 5, 2017
Jul 5, 2017
Jul 5, 2017
Jun 13, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017
May 10, 2017