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The patent EP2987829 was granted to Idemitsu Kosan on Jul 17, 2024. The application was filed on Apr 18, 2014 under application number EP14786064A. 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 |
|---|---|---|---|
| SABIC | Sep 26, 2019 | VON ROHR PATENTANWALTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2010241943 |
| DESCRIPTION | JP2662049B |
| DESCRIPTION | JPH0827978B |
| INTERNATIONAL-SEARCH-REPORT | JP2005507006 |
| INTERNATIONAL-SEARCH-REPORT | JP2011168636 |
| INTERNATIONAL-SEARCH-REPORT | JP2011207954 |
| INTERNATIONAL-SEARCH-REPORT | JP2012246430 |
| INTERNATIONAL-SEARCH-REPORT | WO2011064897 |
| OPPOSITION | EP0662418 |
| OPPOSITION | EP2311911 |
| OPPOSITION | EP2716713 |
| OPPOSITION | JP2001348494 |
| OPPOSITION | JP2005241815 |
| OPPOSITION | JP2010275466 |
| OPPOSITION | JP3995346B |
| OPPOSITION | JPH09110978 |
| OPPOSITION | US2003096889 |
| OPPOSITION | US2007258351 |
| OPPOSITION | US2011128494 |
| OPPOSITION | US2012252941 |
| OPPOSITION | US2013018115 |
| OPPOSITION | US5783651 |
| OPPOSITION | WO0039210 |
| SEARCH | EP2311911 |
| SEARCH | EP2716713 |
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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Abstract
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Request for entry into the European phase
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Copy of the international search report
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