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The patent EP3861912 was granted to Wessel Werk on May 14, 2025. The application was filed on Jan 22, 2021 under application number EP21152988A. 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 |
|---|---|---|---|
| VORWERK & INTERHOLDING | Sep 8, 2022 | GILLE HRABAL PARTNERSCHAFTSGESELLSCHAFT MBB PATENTANWALTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102016105687 |
| OPPOSITION | DE102016101004 |
| OPPOSITION | DE102016105687 |
| OPPOSITION | DE102017118326 |
| OPPOSITION | DE102017118377 |
| OPPOSITION | DE102017222735 |
| OPPOSITION | DE202017107607U |
| OPPOSITION | DE68903940T |
| OPPOSITION | JP2007075319 |
| OPPOSITION | US2012223581 |
| OPPOSITION | US2018035854 |
| OPPOSITION | US2018353038 |
| OPPOSITION | US5896786 |
| OPPOSITION | WO2017117679 |
| OPPOSITION | WO2019112273 |
| OTHER | DE102017222735 |
| OTHER | DE202017107607U |
| SEARCH | CN107028557 |
| SEARCH | DE102016105687 |
| SEARCH | JP2014200406 |
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.
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Decision to grant a European patent
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English translation of the claims
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Filing of the translations of the claims
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French translation of claims
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Letter concerning the printing fee
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Patent document filed by a Third party
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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Matter concerning the application
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Notification of forthcoming publication
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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European search opinion
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European search report
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Information on Search Strategy
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Search started
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Communication to designated inventor
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Letter concerning the priority
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Priority document
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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Priority search results
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Abstract
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Claims
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Description
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Request for grant of a European patent
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