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The patent EP2684867 was granted to Mitsui Chemicals on Jan 2, 2019. The application was filed on Mar 7, 2012 under application number EP12754970A. 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 |
|---|---|---|---|
| COVESTRO DEUTSCHLAND | Oct 2, 2019 | DAVEPON | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2004000114 |
| DESCRIPTION | JP2008056790 |
| DESCRIPTION | JP2009545553 |
| DESCRIPTION | JP2010254764 |
| DESCRIPTION | JP3905638B |
| DESCRIPTION | JPH01215280 |
| DESCRIPTION | JPH02109985 |
| DESCRIPTION | JPH02284485 |
| DESCRIPTION | JPS59125895 |
| DESCRIPTION | JPS61129173 |
| INTERNATIONAL-SEARCH-REPORT | JP2009545553 |
| INTERNATIONAL-SEARCH-REPORT | JP2011201863 |
| INTERNATIONAL-SEARCH-REPORT | JP2011201864 |
| INTERNATIONAL-SEARCH-REPORT | WO2011108473 |
| OPPOSITION | JP2009545553 |
| OPPOSITION | JP2010121011 |
| OPPOSITION | JP2010254764 |
| OPPOSITION | JP5225813B |
| OPPOSITION | US3424780 |
| OPPOSITION | WO2008015134 |
| SEARCH | JP2010254764 |
| SEARCH | WO2008015134 |
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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Jul 7, 2020
Jul 7, 2020
Jul 2, 2020
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Oct 2, 2019
Jan 14, 2019
Dec 6, 2018
Decision to grant a European patent
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Nov 23, 2018
(Electronic) Receipt
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Nov 23, 2018
Filing of the translations of the claims
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Nov 23, 2018
French translation of claims
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Nov 23, 2018
German translation of the claims
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Nov 23, 2018
Letter accompanying subsequently filed items
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Aug 1, 2018
Aug 1, 2018
Aug 1, 2018
Aug 1, 2018
Intention to grant (signatures)
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Aug 1, 2018
Text intended for grant (clean copy)
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Aug 1, 2018
Text intended for grant (sequence listing)
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Aug 1, 2018
Jun 14, 2018
Jun 14, 2018
Jun 7, 2018
(Electronic) Receipt
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Jun 7, 2018
Citation filed by a third party
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Jun 7, 2018
Letter accompanying subsequently filed items
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Jun 7, 2018
Observations by third parties
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Apr 18, 2018
Amended claims with annotations
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Apr 18, 2018
Claims
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Apr 18, 2018
Jan 15, 2018
Annex to the communication
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Jan 15, 2018
Communication from the Examining Division
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Dec 7, 2017
Reply to communication to third party
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Dec 1, 2017
Dec 1, 2017
Nov 27, 2017
(Electronic) Receipt
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Nov 27, 2017
Letter accompanying subsequently filed items
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Nov 27, 2017
Non-patent literature filed by a third party
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Nov 27, 2017
Observations by third parties
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Oct 4, 2017
Oct 4, 2017
Oct 4, 2017
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Jul 14, 2017
Jul 6, 2017
Mar 27, 2017
Annex to the communication
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Mar 27, 2017
Communication from the Examining Division
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Jan 9, 2017
Jan 9, 2017
Dec 22, 2016
(Electronic) Receipt
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Dec 22, 2016
Letter accompanying subsequently filed items
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Dec 22, 2016
Non-patent literature filed by a third party
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Dec 22, 2016
Observations by third parties
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Sep 1, 2016
Sep 1, 2016
May 13, 2016
Annex to the communication
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May 13, 2016
Communication from the Examining Division
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May 9, 2016
Examination started
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Mar 23, 2015
Reply to Written Opinion prepared by the EPO
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Sep 26, 2014
Submission concerning representation
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Sep 11, 2014
Aug 25, 2014
Aug 25, 2014
European search opinion
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Aug 25, 2014
Supplementary European search report
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Aug 7, 2014
Search started
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Dec 18, 2013
Notification of forthcoming publication
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Oct 16, 2013
Oct 14, 2013
Communication to designated inventor
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Oct 14, 2013
Communication to designated inventor
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Oct 14, 2013
Communication to designated inventor
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Oct 14, 2013
Communication to designated inventor
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Sep 24, 2013
Sep 24, 2013
Sep 3, 2013
Aug 9, 2013
(Electronic) Receipt
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Aug 9, 2013
Abstract
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Aug 9, 2013
Aug 9, 2013
Amendments received before examination
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Aug 9, 2013
Claims
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Aug 9, 2013
Converted Sequence Listing
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Aug 9, 2013
Description
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Aug 9, 2013
Drawings
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Aug 9, 2013
Request for entry into the European phase
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Jul 17, 2013
Information on entry into European phase
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Oct 2, 2012
Sep 13, 2012
Converted Sequence Listing
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Sep 13, 2012
Copy of the international search report
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Sep 13, 2012
Sep 13, 2012
International publication pamphlet
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