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The patent EP2164496 was granted to Bayer on Apr 12, 2017. The application was filed on May 21, 2008 under application number EP08758648A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| CEVA ANIMAL HEALTH | Mar 18, 2020 | DORRIES | INTERVENTION |
| CEVA ANIMAL HEALTH | Mar 18, 2020 | DORRIES, HANS ULRICH , DF-MP DORRIES FRANK-MOLNIA & POHLMAN | INTERVENTION |
| CEVA SANTE ANIMALE | Jan 11, 2018 | HOYNG ROKH MONEGIER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE102004042958 |
| INTERNATIONAL-SEARCH-REPORT | DE2413722 |
| INTERNATIONAL-SEARCH-REPORT | DE2718799 |
| OPPOSITION | EP0634174 |
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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English translation of the claims
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Letter accompanying subsequently filed items
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Communication from the Examining Division
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Nov 11, 2014
Examination started
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Submission concerning representation
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CDS Clean up - amended applicant details
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Request for entry into the European phase
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Copy of the international search report
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Copy of the international search report
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Published international application - A2
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May 21, 2008
Abstract
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Claims
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May 21, 2008
Description
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