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The patent EP3911578 was granted to Weener Plastics Group on Aug 9, 2023. The application was filed on Jan 13, 2020 under application number EP20701380A. 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 |
|---|---|---|---|
| APTARGROUP | May 8, 2024 | APPELT | ADMISSIBLE |
| LINN | May 8, 2024 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1802533 |
| DESCRIPTION | EP2106369 |
| INTERNATIONAL-SEARCH-REPORT | EP1802533 |
| INTERNATIONAL-SEARCH-REPORT | EP2106369 |
| INTERNATIONAL-SEARCH-REPORT | WO2008091490 |
| OPPOSITION | EP1802533 |
| OPPOSITION | EP2106369 |
| OPPOSITION | US10000316 |
| OPPOSITION | US2012067922 |
| OPPOSITION | US5904275 |
| OPPOSITION | US6089418 |
| OPPOSITION | US6095381 |
| OPPOSITION | US6971558 |
| OPPOSITION | US8397957 |
| OPPOSITION | WO0029296 |
| OPPOSITION | WO2006021509 |
| OPPOSITION | WO2008091490 |
| OPPOSITION | WO2015150546 |
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
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Jan 12, 2026
Jan 12, 2026
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Jan 5, 2026
(Electronic) Receipt
Appeal
Jan 5, 2026
Jan 5, 2026
Notice of appeal
Appeal
Dec 31, 2025
(Electronic) Receipt
Appeal
Dec 31, 2025
Notice of appeal
Appeal
Dec 31, 2025
Notice of appeal
Appeal
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Means of redress
OPPO
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Aug 22, 2023
Jul 13, 2023
Decision to grant a European patent
Search/Exam
Jul 4, 2023
(Electronic) Receipt
Search/Exam
Jul 4, 2023
Filing of the translations of the claims
Search/Exam
Jul 4, 2023
French translation of claims
Search/Exam
Jul 4, 2023
German translation of the claims
Search/Exam
Jul 4, 2023
Letter accompanying subsequently filed items
Search/Exam
Mar 20, 2023
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Intention to grant (signatures)
Search/Exam
Mar 20, 2023
Text intended for grant (clean copy)
Search/Exam
Mar 20, 2023
Jan 19, 2023
(Electronic) Receipt
Search/Exam
Jan 19, 2023
Claims
Search/Exam
Jan 19, 2023
Letter accompanying subsequently filed items
Search/Exam
Jan 19, 2023
Sep 15, 2022
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Sep 15, 2022
Intention to grant (signatures)
Search/Exam
Sep 15, 2022
Text intended for grant (clean copy)
Search/Exam
Sep 15, 2022
Aug 12, 2022
Examination started
Search/Exam
Feb 23, 2022
(Electronic) Receipt
Search/Exam
Feb 23, 2022
Feb 23, 2022
Amended claims with annotations
Search/Exam
Feb 23, 2022
Amendments received before examination
Search/Exam
Feb 23, 2022
Letter accompanying subsequently filed items
Search/Exam
Oct 27, 2021
Aug 24, 2021
Aug 17, 2021
Priority search results copy provided by EPO
Search/Exam
Aug 3, 2021
(Electronic) Receipt
Search/Exam
Aug 3, 2021
Request for entry into the European phase
Search/Exam
Aug 2, 2021
May 28, 2021
Information on entry into European phase
Search/Exam
Aug 11, 2020
Jul 23, 2020
Copy of the international search report
Search/Exam
Jul 23, 2020
Published international application - A1
Search/Exam