The weekly litigation news digest is live. Subscribe now
The patent EP3757300 was granted to Optigrn on Dec 27, 2023. The application was filed on Jun 5, 2020 under application number EP20178587A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 | Opposition Status |
|---|---|---|---|
| WAVIN | Sep 27, 2024 | VAN BOUWELEN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1001107 |
| DESCRIPTION | EP1260640 |
| DESCRIPTION | EP2982810 |
| DESCRIPTION | EP3202995 |
| DESCRIPTION | EP3460133 |
| EXAMINATION | WO2005026053 |
| OPPOSITION | CN109757342 |
| OPPOSITION | DE102017101328 |
| OPPOSITION | JP2001049806 |
| OPPOSITION | US2016115675 |
| OPPOSITION | US2016135381 |
| OPPOSITION | WO2005026053 |
| SEARCH | US2016135381 |
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
Dec 3, 2025
Dec 3, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Nov 28, 2025
Apr 2, 2025
Apr 2, 2025
Apr 2, 2025
Apr 2, 2025
Apr 2, 2025
Feb 14, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Oct 11, 2024
Oct 11, 2024
Oct 8, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Jan 9, 2024
Nov 30, 2023
Decision to grant a European patent
Search/Exam
Nov 20, 2023
(Electronic) Receipt
Search/Exam
Nov 20, 2023
English translation of the claims
Search/Exam
Nov 20, 2023
French translation of claims
Search/Exam
Nov 20, 2023
Letter accompanying subsequently filed items
Search/Exam
Oct 2, 2023
Annexes in respect of a client data request
Search/Exam
Oct 2, 2023
Oct 2, 2023
Oct 2, 2023
Letter accompanying subsequently filed items
Search/Exam
Oct 2, 2023
Sep 24, 2023
Annexes in respect of a client data request
Search/Exam
Sep 24, 2023
Aug 11, 2023
Aug 11, 2023
Aug 11, 2023
Aug 11, 2023
Text intended for grant (clean copy)
Search/Exam
Aug 11, 2023
Aug 4, 2022
(Electronic) Receipt
Search/Exam
Aug 4, 2022
Amended claims with annotations
Search/Exam
Aug 4, 2022
Amended description with annotations
Search/Exam
Aug 4, 2022
Claims
Search/Exam
Aug 4, 2022
Description
Search/Exam
Aug 4, 2022
Letter accompanying subsequently filed items
Search/Exam
Aug 4, 2022
May 12, 2022
Annex to the communication
Search/Exam
May 12, 2022
Communication from the Examining Division
Search/Exam
May 6, 2022
Examination started
Search/Exam
Mar 25, 2022
Letter concerning fees and payments
Search/Exam
Jan 15, 2021
Dec 18, 2020
Dec 18, 2020
Amended claims with annotations
Search/Exam
Dec 18, 2020
Dec 18, 2020
Amended description with annotations
Search/Exam
Dec 18, 2020
Amendments received before examination
Search/Exam
Dec 18, 2020
Written request for examination
Search/Exam
Dec 2, 2020
Notification of forthcoming publication
Search/Exam
Nov 17, 2020
Nov 17, 2020
European search opinion
Search/Exam
Nov 17, 2020
European search report
Search/Exam
Nov 17, 2020
Information on Search Strategy
Search/Exam
Nov 5, 2020
Search started
Search/Exam
Jul 29, 2020
Communication to designated inventor
Search/Exam
Jun 19, 2020
Letter concerning the priority
Search/Exam
Jun 19, 2020
Priority document
Search/Exam
Jun 5, 2020
Abstract
Search/Exam
Jun 5, 2020
Jun 5, 2020
Claims
Search/Exam
Jun 5, 2020
Description
Search/Exam
Jun 5, 2020
Designation of inventor
Search/Exam
Jun 5, 2020
Drawings
Search/Exam
Jun 5, 2020
Priority search results
Search/Exam
Jun 5, 2020
Request for grant of a European patent
Search/Exam