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The patent EP2676997 was granted to Adeka on Mar 17, 2021. The application was filed on Dec 28, 2011 under application number EP11858881A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| CHEMSON POLYMER ADDITIVE | Feb 22, 2019 | VIERING | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2003160707 |
| DESCRIPTION | JP2008214480 |
| DESCRIPTION | JP2009132757 |
| DESCRIPTION | JP2009132758 |
| DESCRIPTION | JPS462280B |
| DESCRIPTION | JPS5030039B |
| DESCRIPTION | JPS5129129B |
| DESCRIPTION | JPS61174270 |
| EXAMINATION | EP2336237 |
| EXAMINATION | WO2009021652 |
| EXAMINATION | WO2010041378 |
| INTERNATIONAL-SEARCH-REPORT | JP2009132757 |
| INTERNATIONAL-SEARCH-REPORT | JP2009132758 |
| INTERNATIONAL-SEARCH-REPORT | WO2007132591 |
| OPPOSITION | JP2008214480 |
| OPPOSITION | JP2009132757 |
| OPPOSITION | JP2009132758 |
| SEARCH | EP2223970 |
| SEARCH | JP2008214480 |
| SEARCH | JP2009132757 |
| SEARCH | JP2009132758 |
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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Claims
OPPO
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Description
OPPO
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Claims
OPPO
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Jun 4, 2018
Apr 26, 2018
Decision to grant a European patent
Search/Exam
Apr 9, 2018
(Electronic) Receipt
Search/Exam
Apr 9, 2018
Filing of the translations of the claims
Search/Exam
Apr 9, 2018
French translation of claims
Search/Exam
Apr 9, 2018
German translation of the claims
Search/Exam
Apr 9, 2018
Letter accompanying subsequently filed items
Search/Exam
Feb 9, 2018
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Intention to grant (signatures)
Search/Exam
Feb 9, 2018
Text intended for grant (clean copy)
Search/Exam
Feb 9, 2018
Feb 1, 2018
Dec 19, 2016
Annex
Search/Exam
Dec 19, 2016
Claims
Search/Exam
Dec 19, 2016
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Oct 24, 2016
Jun 28, 2016
Annex to the communication
Search/Exam
Jun 28, 2016
Communication from the Examining Division
Search/Exam
Jun 23, 2016
Examination started
Search/Exam
Feb 2, 2015
Feb 2, 2015
Amended claims with annotations
Search/Exam
Feb 2, 2015
Amendments received before examination
Search/Exam
Jul 25, 2014
Jul 9, 2014
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European search opinion
Search/Exam
Jul 9, 2014
Supplementary European search report
Search/Exam
Jul 1, 2014
Search started
Search/Exam
Nov 27, 2013
Notification of forthcoming publication
Search/Exam
Sep 24, 2013
Sep 20, 2013
Communication to designated inventor
Search/Exam
Sep 20, 2013
Communication to designated inventor
Search/Exam
Sep 20, 2013
Communication to designated inventor
Search/Exam
Sep 20, 2013
Communication to designated inventor
Search/Exam
Sep 3, 2013
Sep 3, 2013
Jul 30, 2013
Notification of the recording of a change
Search/Exam
Jul 25, 2013
Abstract
Search/Exam
Jul 25, 2013
Claims
Search/Exam
Jul 25, 2013
Description
Search/Exam
Jul 25, 2013
Payment of fees and costs
Search/Exam
Jul 25, 2013
Request for entry into the European phase
Search/Exam
Jun 28, 2013
Information on entry into European phase
Search/Exam
Sep 11, 2012
Aug 23, 2012
Copy of the international search report
Search/Exam
Aug 23, 2012
Aug 23, 2012
International publication pamphlet
Search/Exam