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The patent EP2841465 was granted to Bayer Materialscience on Oct 4, 2017. The application was filed on Apr 22, 2013 under application number EP13718571A. The patent is currently recorded with a legal status of "Opposition Rejected".

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 |
|---|---|---|---|
| INEOS STYROLUTION GROUP | Jul 3, 2018 | JACOBI | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE1495626 |
| DESCRIPTION | DE1961668 |
| DESCRIPTION | DE2021398 |
| DESCRIPTION | DE2232877 |
| DESCRIPTION | DE2703376 |
| DESCRIPTION | DE2714544 |
| DESCRIPTION | DE2815098 |
| DESCRIPTION | DE2842005 |
| DESCRIPTION | DE2940024 |
| DESCRIPTION | DE3000610 |
| DESCRIPTION | DE3007934 |
| DESCRIPTION | DE3334782 |
| DESCRIPTION | DE3832396 |
| DESCRIPTION | EP0363608 |
| DESCRIPTION | EP0459161 |
| DESCRIPTION | EP0640655 |
| DESCRIPTION | EP0728811 |
| DESCRIPTION | EP0768157 |
| DESCRIPTION | EP0867463 |
| DESCRIPTION | US3419634 |
| DESCRIPTION | US5844028 |
| DESCRIPTION | WO2009071537 |
| DESCRIPTION | WO9740092 |
| DESCRIPTION | WO9828344 |
| INTERNATIONAL-SEARCH-REPORT | US2005046070 |
| INTERNATIONAL-SEARCH-REPORT | US2010227965 |
| INTERNATIONAL-SEARCH-REPORT | US2010267889 |
| INTERNATIONAL-SEARCH-REPORT | WO2008064933 |
| INTERNATIONAL-SEARCH-REPORT | WO2008138534 |
| INTERNATIONAL-SEARCH-REPORT | WO2009071537 |
| INTERNATIONAL-SEARCH-REPORT | WO2011131727 |
| OPPOSITION | DE10353952 |
| OPPOSITION | DE4408213 |
| OPPOSITION | EP0006503 |
| OPPOSITION | EP0391178 |
| OPPOSITION | EP0867463 |
| OPPOSITION | EP1341830 |
| OPPOSITION | US2005046070 |
| OPPOSITION | US2010227965 |
| OPPOSITION | US2010267889 |
| OPPOSITION | WO0027918 |
| OPPOSITION | WO0162848 |
| OPPOSITION | WO2004050765 |
| OPPOSITION | WO2007113297 |
| OPPOSITION | WO2008064933 |
| OPPOSITION | WO2008138534 |
| OPPOSITION | WO2009071537 |
| OPPOSITION | WO2011131727 |
| OPPOSITION | WO9828344 |
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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Jun 30, 2020
Refund of fees
Search/Exam
Jun 26, 2020
Jun 26, 2020
Jun 24, 2020
Jun 18, 2020
Jun 15, 2020
(Electronic) Receipt
Appeal
Jun 15, 2020
Jun 15, 2020
Withdrawal of an appeal
Appeal
Jun 10, 2020
Jun 9, 2020
May 27, 2020
(Electronic) Receipt
Appeal
May 27, 2020
May 27, 2020
May 27, 2020
May 27, 2020
Apr 8, 2020
Apr 8, 2020
Apr 2, 2020
(Electronic) Receipt
Appeal
Apr 2, 2020
Apr 2, 2020
Notice of appeal
Appeal
Jan 27, 2020
Jan 27, 2020
Jan 27, 2020
Jan 27, 2020
Jan 23, 2020
Jan 23, 2020
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Means of redress
OPPO
Jan 23, 2020
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Nov 25, 2019
Oct 28, 2019
Oct 25, 2019
Oct 23, 2019
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Oct 1, 2019
Sep 24, 2019
Sep 24, 2019
Sep 24, 2019
Claims
OPPO
Sep 24, 2019
Sep 24, 2019
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Apr 23, 2019
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Feb 6, 2019
Dec 28, 2018
Dec 21, 2018
Nov 28, 2018
Nov 22, 2018
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
Claims
OPPO
Nov 22, 2018
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Oct 12, 2017
Sep 7, 2017
Decision to grant a European patent
Search/Exam
Aug 22, 2017
(Electronic) Receipt
Search/Exam
Aug 22, 2017
English translation of the claims
Search/Exam
Aug 22, 2017
Filing of the translations of the claims
Search/Exam
Aug 22, 2017
French translation of claims
Search/Exam
Aug 22, 2017
Letter accompanying subsequently filed items
Search/Exam
May 29, 2017
May 29, 2017
May 29, 2017
Intention to grant (signatures)
Search/Exam
May 29, 2017
Text intended for grant (clean copy)
Search/Exam
May 29, 2017
Feb 15, 2017
(Electronic) Receipt
Search/Exam
Feb 15, 2017
Feb 15, 2017
Amended description with annotations
Search/Exam
Feb 15, 2017
Letter accompanying subsequently filed items
Search/Exam
Feb 15, 2017
Nov 3, 2016
Annex to the communication
Search/Exam
Nov 3, 2016
Communication from the Examining Division
Search/Exam
Oct 10, 2016
Submission concerning representation
Search/Exam
Jul 8, 2016
(Electronic) Receipt
Search/Exam
Jul 8, 2016
Amended claims with annotations
Search/Exam
Jul 8, 2016
Claims
Search/Exam
Jul 8, 2016
Letter accompanying subsequently filed items
Search/Exam
Jul 8, 2016
Mar 8, 2016
Annex to the communication
Search/Exam
Mar 8, 2016
Communication from the Examining Division
Search/Exam
Mar 2, 2016
Examination started
Search/Exam
Sep 25, 2015
Sep 25, 2015
Sep 17, 2015
Sep 11, 2015
Sep 1, 2015
Aug 17, 2015
Jun 11, 2015
May 13, 2015
(Electronic) Receipt
Search/Exam
May 13, 2015
Letter accompanying subsequently filed items
Search/Exam
May 13, 2015
Reply to Written Opinion prepared by the EPO
Search/Exam
Feb 16, 2015
Feb 16, 2015
Notification of the recording of a change
Search/Exam
Feb 4, 2015
Dec 4, 2014
Dec 2, 2014
Communication to designated inventor
Search/Exam
Dec 2, 2014
Communication to designated inventor
Search/Exam
Dec 2, 2014
Communication to designated inventor
Search/Exam
Dec 2, 2014
Communication to designated inventor
Search/Exam
Dec 2, 2014
Communication to designated inventor
Search/Exam
Dec 2, 2014
Communication to designated inventor
Search/Exam
Dec 2, 2014
Communication to designated inventor
Search/Exam
Nov 27, 2014
Priority search results copy provided by EPO
Search/Exam
Nov 12, 2014
Sep 10, 2014
(Electronic) Receipt
Search/Exam
Sep 10, 2014
General authorisation
Search/Exam
Sep 10, 2014
Request for entry into the European phase
Search/Exam
Sep 5, 2014
Information on entry into European phase
Search/Exam
Nov 26, 2013
Oct 31, 2013
Copy of the international search report
Search/Exam
Oct 31, 2013
Copy of the international search report
Search/Exam
Oct 31, 2013
Published international application - A1
Search/Exam
Aug 6, 2013
Aug 6, 2013
Aug 6, 2013
Apr 22, 2013
(Electronic) Receipt
PCTRO
Apr 22, 2013
Abstract
PCTRO
Apr 22, 2013
Claims
PCTRO
Apr 22, 2013
Description
PCTRO
Apr 22, 2013