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The patent EP3957944 was granted to Stoneage on Sep 3, 2025. The application was filed on Jun 25, 2021 under application number EP21181855A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| PEINEMANN EQUIPMENT | Sep 28, 2023 | ARNOLD & SIEDSMA | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US10024613 |
| DESCRIPTION | US10684082 |
| DESCRIPTION | US4095305 |
| DESCRIPTION | US6626195 |
| DESCRIPTION | US6681839 |
| DESCRIPTION | US7530363 |
| OPPOSITION | US2006249185 |
| OPPOSITION | US2016025432 |
| OPPOSITION | US2016025433 |
| OPPOSITION | US6681839 |
| OPPOSITION | WO2006101674 |
| OPPOSITION | WO2016014626 |
| OPPOSITION | WO2020086873 |
| SEARCH | US2016025432 |
| SEARCH | US2016025433 |
| SEARCH | WO2016014626 |
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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Description
OPPO
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Decision to grant a European patent
Search/Exam
Nov 22, 2022
(Electronic) Receipt
Search/Exam
Nov 22, 2022
Filing of the translations of the claims
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Nov 22, 2022
French translation of claims
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Nov 22, 2022
German translation of the claims
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Aug 5, 2022
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Intention to grant (signatures)
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Aug 5, 2022
Text intended for grant (clean copy)
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Aug 5, 2022
Jun 24, 2022
Examination started
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Apr 20, 2022
(Electronic) Receipt
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Amended claims with annotations
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Amended description with annotations
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Apr 20, 2022
Amendments received before examination
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Apr 20, 2022
Letter accompanying subsequently filed items
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Notification of forthcoming publication
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Nov 24, 2021
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European search opinion
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Nov 24, 2021
European search report
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Nov 24, 2021
Information on Search Strategy
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Jul 13, 2021
Jun 29, 2021
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Abstract
Search/Exam
Jun 25, 2021
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Claims
Search/Exam
Jun 25, 2021
Description
Search/Exam
Jun 25, 2021
Designation of inventor
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Jun 25, 2021
Drawings
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Jun 25, 2021
Request for grant of a European patent
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