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The patent EP2658517 was granted to DSM Assets on Oct 6, 2021. The application was filed on Dec 27, 2011 under application number EP11805053A. 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 |
|---|---|---|---|
| BASF | Mar 6, 2019 | BASF ASSOCIATION | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
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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OPPO
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OPPO
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Decision to grant a European patent
Search/Exam
Apr 27, 2018
(Electronic) Receipt
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Apr 27, 2018
Filing of the translations of the claims
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Apr 27, 2018
French translation of claims
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Apr 27, 2018
German translation of the claims
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Apr 27, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 25, 2018
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Intention to grant (signatures)
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Jan 25, 2018
Text intended for grant (clean copy)
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Jan 25, 2018
Jan 12, 2018
Letter dealing with oral proceedings
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Jan 5, 2018
Dec 29, 2017
Advice of delivery
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Dec 27, 2017
Advice of delivery
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Dec 19, 2017
Annex to the communication
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Dec 19, 2017
Consultation by telephone/in person
Search/Exam
Dec 19, 2017
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(Electronic) Receipt
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Dec 18, 2017
Amended claims with annotations
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Dec 18, 2017
Amended description with annotations
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Dec 18, 2017
Claims
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Dec 18, 2017
Description
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Dec 18, 2017
Letter accompanying subsequently filed items
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Dec 18, 2017
Letter dealing with oral proceedings
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Dec 15, 2017
Acknowledgement of a document
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Dec 15, 2017
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Summons to attend oral proceedings
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Oct 30, 2017
(Electronic) Receipt
Search/Exam
Oct 30, 2017
Amended claims with annotations
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Oct 30, 2017
Amended claims with annotations
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Amended claims with annotations
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Oct 30, 2017
Amended claims with annotations
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Oct 30, 2017
Claims
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Oct 30, 2017
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Oct 30, 2017
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Oct 30, 2017
Claims
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Oct 30, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 30, 2017
Matter concerning the application
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Oct 30, 2017
Jul 20, 2017
Advice of delivery
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Jul 20, 2017
Advice of delivery
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Jul 14, 2017
Acknowledgement of a document
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Jul 14, 2017
Preparation for oral proceedings
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Jul 14, 2017
Summons to attend oral proceedings
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Jul 12, 2017
Annex to the communication
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Dec 5, 2016
(Electronic) Receipt
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Dec 5, 2016
Annex
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Dec 5, 2016
Letter accompanying subsequently filed items
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Dec 5, 2016
Oct 10, 2016
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(Electronic) Receipt
Search/Exam
Oct 3, 2016
Letter accompanying subsequently filed items
Search/Exam
Jun 6, 2016
Annex to the communication
Search/Exam
Jun 6, 2016
Communication from the Examining Division
Search/Exam
Feb 23, 2016
(Electronic) Receipt
Search/Exam
Feb 23, 2016
Amended claims with annotations
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Feb 23, 2016
Claims
Search/Exam
Feb 23, 2016
Letter accompanying subsequently filed items
Search/Exam
Feb 23, 2016
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(Electronic) Receipt
Search/Exam
Dec 3, 2015
Aug 26, 2015
Annex to the communication
Search/Exam
Aug 26, 2015
Communication from the Examining Division
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Aug 20, 2015
Examination started
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May 27, 2014
(Electronic) Receipt
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May 27, 2014
Priority search results
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May 27, 2014
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(Electronic) Receipt
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Jan 13, 2014
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Amended claims with annotations
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Jan 13, 2014
Amendments received before examination
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Jan 13, 2014
Letter accompanying subsequently filed items
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Oct 9, 2013
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jul 29, 2013
Refund of fees
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Jul 17, 2013
Jun 24, 2013
(Electronic) Receipt
Search/Exam
Jun 24, 2013
Request for entry into the European phase
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May 13, 2013
Information on entry into European phase
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Jul 31, 2012
Jul 31, 2012
Notification of the recording of a change
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Jul 25, 2012
Jul 9, 2012
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Notification of the recording of a change
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Jul 5, 2012
Copy of the international search report
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Jul 5, 2012
Published international application - A1
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Jun 13, 2012
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Dec 27, 2011
(Electronic) Receipt
PCTRO
Dec 27, 2011
Abstract
PCTRO
Dec 27, 2011
Claims
PCTRO
Dec 27, 2011
Description
PCTRO