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The patent EP2583973 was granted to Kyowa Hakko Kirin on Mar 21, 2018. The application was filed on Jun 20, 2011 under application number EP11798094A. 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 |
|---|---|---|---|
| MICHALSKI HUTTERMANN & PARTNER PATENTANWALTE MBB | Dec 19, 2018 | MICHALSKI HUTTERMANN & PARTNER PATENTANWALTE MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JPH05504579 |
| EXAMINATION | US2005176109 |
| EXAMINATION | US2006030696 |
| EXAMINATION | US2007054390 |
| EXAMINATION | US2008064861 |
| EXAMINATION | US2008312425 |
| EXAMINATION | US2009286283 |
| EXAMINATION | US5429746 |
| EXAMINATION | WO2010056550 |
| INTERNATIONAL-SEARCH-REPORT | JP2009522580 |
| INTERNATIONAL-SEARCH-REPORT | WO2010019493 |
| OPPOSITION | EP2182003 |
| OPPOSITION | EP2383336 |
| OPPOSITION | US2005176109 |
| OPPOSITION | US2006030696 |
| OPPOSITION | US2006257972 |
| OPPOSITION | US2007054390 |
| OPPOSITION | US2008064861 |
| OPPOSITION | US2008312425 |
| OPPOSITION | US2009162372 |
| OPPOSITION | US2009318674 |
| OPPOSITION | US5429746 |
| OPPOSITION | WO2005051994 |
| OPPOSITION | WO2006023403 |
| OPPOSITION | WO2006023420 |
| OPPOSITION | WO2009025300 |
| OPPOSITION | WO2010019493 |
| OPPOSITION | WO2010056550 |
| OPPOSITION | WO2010084851 |
| SEARCH | US2006257972 |
| SEARCH | US2009162372 |
| SEARCH | US2009318674 |
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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Preparation for oral proceedings
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Amended claims with annotations
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Amended description with annotations
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Annex
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Description
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Annex to the communication
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Nov 30, 2015
Communication from the Examining Division
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Nov 20, 2015
Examination started
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Amended claims with annotations
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European search opinion
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Oct 1, 2014
Supplementary European search report
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Sep 26, 2014
Submission concerning representation
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Sep 18, 2014
Search started
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Mar 27, 2013
Notification of forthcoming publication
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Feb 19, 2013
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Communication to designated inventor
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Dec 20, 2012
Abstract
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Dec 20, 2012
Description
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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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International publication pamphlet
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