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The patent EP2922818 was granted to Hangzhou DAC Biotech on Sep 5, 2018. The application was filed on Nov 24, 2012 under application number EP12888899A. 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 |
|---|---|---|---|
| MASCHIO & SOAMES | Jun 3, 2019 | MASCHIO & SOAMES | - |
| STRAWMAN | May 31, 2019 | MEWBURN ELLIS | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2003195196 |
| DESCRIPTION | US2010203007 |
| DESCRIPTION | US2010316656 |
| DESCRIPTION | US4000304 |
| DESCRIPTION | US4427587 |
| DESCRIPTION | US4464467 |
| DESCRIPTION | US4508647 |
| DESCRIPTION | US4663453 |
| DESCRIPTION | US4683230 |
| DESCRIPTION | US4723003 |
| DESCRIPTION | US4723007 |
| DESCRIPTION | US4761412 |
| DESCRIPTION | US4764616 |
| DESCRIPTION | US4935362 |
| DESCRIPTION | US5880122 |
| DESCRIPTION | US6344451 |
| DESCRIPTION | US6562806 |
| DESCRIPTION | US6608192 |
| DESCRIPTION | US6660856 |
| DESCRIPTION | US6747144 |
| DESCRIPTION | US6800622 |
| DESCRIPTION | US6884799 |
| DESCRIPTION | US6909006 |
| DESCRIPTION | US6951853 |
| DESCRIPTION | US6977254 |
| DESCRIPTION | US6979684 |
| DESCRIPTION | US7015215 |
| DESCRIPTION | US7022699 |
| DESCRIPTION | US7049311 |
| DESCRIPTION | US7056913 |
| DESCRIPTION | US7064120 |
| DESCRIPTION | US7067511 |
| DESCRIPTION | US7109193 |
| DESCRIPTION | US7173026 |
| DESCRIPTION | US7189710 |
| DESCRIPTION | US7202239 |
| DESCRIPTION | US7265105 |
| DESCRIPTION | US7312210 |
| DESCRIPTION | US7326700 |
| DESCRIPTION | US7407951 |
| DESCRIPTION | US7429658 |
| DESCRIPTION | US7511032 |
| DESCRIPTION | US7528126 |
| DESCRIPTION | US7528128 |
| DESCRIPTION | US7557099 |
| DESCRIPTION | US7608615 |
| DESCRIPTION | US7612062 |
| DESCRIPTION | US7678787 |
| DESCRIPTION | US7691848 |
| DESCRIPTION | US7704924 |
| DESCRIPTION | US7741319 |
| DESCRIPTION | US7834005 |
| DESCRIPTION | US8034808 |
| DESCRIPTION | US8153627 |
| DESCRIPTION | US8163736 |
| INTERNATIONAL-SEARCH-REPORT | WO2008034019 |
| INTERNATIONAL-SEARCH-REPORT | WO2008070291 |
| INTERNATIONAL-SEARCH-REPORT | WO2009002993 |
| OPPOSITION | EP1625857 |
| OPPOSITION | US4227918 |
| OPPOSITION | US5094848 |
| OPPOSITION | US6214345 |
| OPPOSITION | WO02087497 |
| OPPOSITION | WO2008015415 |
| OPPOSITION | WO2009134976 |
| OPPOSITION | WO2009134977 |
| OPPOSITION | WO2012145112 |
| OPPOSITION | WO9741897 |
| SEARCH | US4227918 |
| SEARCH | WO2012145112 |
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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Submission concerning representation
Search/Exam
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Decision to grant a European patent
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Claims
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Description
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Annex to the communication
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Communication from the Examining Division
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Examination started
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Amended claims with annotations
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Apr 27, 2017
Maintenance of the application
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European search opinion
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Information on Search Strategy
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Supplementary European search report
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Sep 29, 2016
Search started
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Jan 4, 2016
Letter accompanying subsequently filed items
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Sep 2, 2015
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Communication to designated inventor
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Apr 30, 2015
Request for entry into the European phase
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Apr 7, 2015
Information on entry into European phase
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May 30, 2014
Copy of the international search report
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May 30, 2014
Published international application - A1
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