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The patent EP2311492 was granted to Chugai Seiyaku Kabushiki Kaisha on Oct 4, 2017. The application was filed on Aug 13, 2001 under application number EP10194382A. 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 |
|---|---|---|---|
| MATHYS & SQUIRE | Jul 4, 2018 | GRIFFIN | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JPH08151398 |
| DESCRIPTION | JPH08506023 |
| DESCRIPTION | JPH0899902 |
| DESCRIPTION | JPH11315031 |
| DESCRIPTION | JPS6112288 |
| DESCRIPTION | WO9012874 |
| DESCRIPTION | WO9219759 |
| DESCRIPTION | WO9813388 |
| DESCRIPTION | WO9814580 |
| DESCRIPTION | WO9951743 |
| EXAMINATION | WO9856418 |
| OPPOSITION | JPH0899902 |
| OPPOSITION | US4597966 |
| OPPOSITION | US5656730 |
| OPPOSITION | WO9006764 |
| OTHER | WO9856418 |
| SEARCH | EP0306824 |
| SEARCH | JPH0899902 |
| SEARCH | US4597966 |
| SEARCH | WO9822136 |
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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OPPO
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OPPO
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OPPO
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OPPO
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Oct 12, 2017
Sep 7, 2017
Decision to grant a European patent
Search/Exam
Aug 9, 2017
Filing of the translations of the claims
Search/Exam
Aug 9, 2017
French translation of claims
Search/Exam
Aug 9, 2017
German translation of the claims
Search/Exam
Aug 9, 2017
Payment of fees and costs
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Aug 8, 2017
Filing of the translations of the claims
Search/Exam
Aug 8, 2017
French translation of claims
Search/Exam
Aug 8, 2017
German translation of the claims
Search/Exam
Aug 8, 2017
Payment of fees and costs
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Aug 8, 2017
Payment of fees and costs
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Apr 6, 2017
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Intention to grant (signatures)
Search/Exam
Apr 6, 2017
Text intended for grant (clean copy)
Search/Exam
Apr 6, 2017
Mar 16, 2017
Mar 13, 2017
Mar 7, 2017
Amended description with annotations
Search/Exam
Mar 7, 2017
Description
Search/Exam
Mar 7, 2017
Mar 3, 2017
Annex to the communication
Search/Exam
Mar 3, 2017
Consultation by telephone/in person
Search/Exam
Mar 3, 2017
Consultation by telephone/in person
Search/Exam
Mar 3, 2017
Feb 14, 2017
Amended claims with annotations
Search/Exam
Feb 14, 2017
Claims
Search/Exam
Feb 14, 2017
Letter dealing with oral proceedings
Search/Exam
Feb 14, 2017
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Aug 11, 2016
Advice of delivery
Search/Exam
Aug 11, 2016
Advice of delivery
Search/Exam
Aug 10, 2016
Acknowledgement of a document
Search/Exam
Aug 10, 2016
Annex to the communication
Search/Exam
Aug 10, 2016
Summons to attend oral proceedings
Search/Exam
Aug 3, 2016
Preparation for oral proceedings
Search/Exam
Aug 2, 2016
Jul 28, 2016
Jul 20, 2016
Non-patent literature filed by a third party
Search/Exam
Jul 20, 2016
Non-patent literature filed by a third party
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Jul 20, 2016
Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Jul 20, 2016
Non-patent literature filed by a third party
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Jul 20, 2016
Non-scannable object
Search/Exam
Jul 20, 2016
Observations by third parties
Search/Exam
Apr 1, 2016
Amended claims with annotations
Search/Exam
Apr 1, 2016
Claims
Search/Exam
Apr 1, 2016
Feb 10, 2016
Feb 2, 2016
Sep 24, 2015
Annex to the communication
Search/Exam
Sep 24, 2015
Communication from the Examining Division
Search/Exam
Jul 30, 2015
Amended claims with annotations
Search/Exam
Jul 30, 2015
Claims
Search/Exam
Jul 30, 2015
Jul 21, 2015
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Jul 15, 2015
Citation filed by a third party
Search/Exam
Jul 15, 2015
Observations by third parties
Search/Exam
Jun 11, 2015
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Mar 12, 2015
Submission concerning representation
Search/Exam
Jan 27, 2015
Annex to the communication
Search/Exam
Jan 27, 2015
Communication from the Examining Division
Search/Exam
Jan 7, 2015
May 18, 2012
Amended claims with annotations
Search/Exam
May 18, 2012
Claims
Search/Exam
May 18, 2012
Mar 26, 2012
Mar 16, 2012
Mar 6, 2012
Refund of fees
Search/Exam
Nov 10, 2011
Annex to the communication
Search/Exam
Nov 10, 2011
Communication from the Examining Division
Search/Exam
Oct 20, 2011
Oct 20, 2011
Amendments received before examination
Search/Exam
Apr 27, 2011
Mar 23, 2011
Notification of forthcoming publication
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Feb 25, 2011
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European search opinion
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Feb 25, 2011
European search report
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Jan 31, 2011
Dec 9, 2010
Abstract
Search/Exam
Dec 9, 2010
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Claims
Search/Exam
Dec 9, 2010
Description
Search/Exam
Dec 9, 2010
Designation of inventor
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Dec 9, 2010
Designation of inventor
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Dec 9, 2010
Designation of inventor
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Dec 9, 2010
Designation of inventor
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Dec 9, 2010
Designation of inventor
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Dec 9, 2010
Drawings
Search/Exam
Dec 9, 2010
Letter concerning search matters
Search/Exam
Dec 9, 2010
Request for grant of a European patent
Search/Exam
Feb 28, 2002
Feb 28, 2002