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The patent EP2578636 was granted to Idemitsu Kosan on Jun 22, 2022. The application was filed on May 26, 2011 under application number EP11786729A. 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 SABIC INNOVATIVE PLASTICS | Nov 23, 2018 | SABIC GROUP | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2006143949 |
| DESCRIPTION | JP2009108281 |
| DESCRIPTION | JPS4740445B |
| EXAMINATION | EP2492315 |
| EXAMINATION | WO2011049228 |
| INTERNATIONAL-SEARCH-REPORT | JP2009108281 |
| INTERNATIONAL-SEARCH-REPORT | JP2009143995 |
| INTERNATIONAL-SEARCH-REPORT | JP2009249550 |
| INTERNATIONAL-SEARCH-REPORT | JP2010065164 |
| OPPOSITION | EP2009057 |
| OPPOSITION | EP2031020 |
| OPPOSITION | EP2058369 |
| OPPOSITION | EP2112203 |
| OPPOSITION | EP2492315 |
| OPPOSITION | EP2497800 |
| OPPOSITION | JP2002037997 |
| OPPOSITION | JP2005200526 |
| OPPOSITION | JP2007031583 |
| OPPOSITION | JP2008189804 |
| OPPOSITION | JP2009108281 |
| OPPOSITION | JP2010065163 |
| OPPOSITION | JPS535798 |
| OPPOSITION | KR20110014315 |
| OPPOSITION | US2003060548 |
| OPPOSITION | US2007213452 |
| OPPOSITION | US4735971 |
| OPPOSITION | US5548038 |
| OPPOSITION | US6001943 |
| OTHER | EP2492315 |
| OTHER | JP2009108281 |
| OTHER | JP2010065164 |
| OTHER | US5548038 |
| OTHER | US6001943 |
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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May 27, 2022
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Refund of fees
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Intention to grant (signatures)
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Amended claims with annotations
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Communication from the Examining Division
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Translation of priority document
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Translation of priority document
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Annex to the communication
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Communication from the Examining Division
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Supplementary European search report
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Search started
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Notification of forthcoming publication
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Communication to designated inventor
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Nov 20, 2012
Abstract
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Nov 20, 2012
Claims
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Nov 20, 2012
Description
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Drawings
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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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International publication pamphlet
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