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The patent EP2649130 was granted to DSM Assets on Aug 23, 2017. The application was filed on Dec 9, 2011 under application number EP11794148A. 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 |
|---|---|---|---|
| LANXESS DEUTSCHLAND | May 22, 2018 | - | ADMISSIBLE |
| RPE | May 22, 2018 | HARTZ | ADMISSIBLE |
| TORAY INDUSTRIES | May 22, 2018 | MEWBURN ELLIS | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2002088806 |
| DESCRIPTION | US2009203845 |
| INTERNATIONAL-SEARCH-REPORT | EP2457952 |
| INTERNATIONAL-SEARCH-REPORT | US2007246475 |
| INTERNATIONAL-SEARCH-REPORT | US2009203845 |
| INTERNATIONAL-SEARCH-REPORT | WO9824846 |
| OPPOSITION | CA2009945 |
| OPPOSITION | CA2205974 |
| OPPOSITION | CA2347238 |
| OPPOSITION | DE19922933 |
| OPPOSITION | DE3786407T |
| OPPOSITION | EP0353850 |
| OPPOSITION | EP0383220 |
| OPPOSITION | EP0810260 |
| OPPOSITION | EP2270097 |
| OPPOSITION | EP2598577 |
| OPPOSITION | JP2005067107 |
| OPPOSITION | JPH101608 |
| OPPOSITION | US2002007021 |
| OPPOSITION | US2003092822 |
| OPPOSITION | US2007246475 |
| OPPOSITION | US2009203845 |
| OPPOSITION | US5741601 |
| OPPOSITION | US6780522 |
| OPPOSITION | WO0023506 |
| OPPOSITION | WO0166643 |
| OPPOSITION | WO2009119759 |
| OPPOSITION | WO9824846 |
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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Description
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Nov 30, 2022
Refund of fees
Appeal
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Filing of the translations of the claims
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French translation of claims
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Amended claims with annotations
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Mar 9, 2017
Letter accompanying subsequently filed items
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Mar 9, 2017
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Annex to the communication
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Nov 10, 2016
Communication from the Examining Division
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Letter accompanying subsequently filed items
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Reply to Written Opinion prepared by the EPO
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Communication to designated inventor
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Communication to designated inventor
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Priority search results copy provided by EPO
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Request for entry into the European phase
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Information on entry into European phase
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Copy of the international search report
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Published international application - A2
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Dec 9, 2011
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PCTRO
Dec 9, 2011
Abstract
PCTRO
Dec 9, 2011
Claims
PCTRO
Dec 9, 2011
Description
PCTRO
Dec 9, 2011