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The patent EP2580281 was granted to DOW on Mar 7, 2018. The application was filed on Jun 6, 2011 under application number EP11727052A. 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 |
|---|---|---|---|
| BASELL POLIOLEFINE ITALIA | Dec 7, 2018 | LYONDELLBASELL | ADMISSIBLE |
| SABIC SABIC PETROCHEMICALS | Dec 6, 2018 | SABIC GROUP | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US20100797717 |
| INTERNATIONAL-SEARCH-REPORT | EP2108679 |
| INTERNATIONAL-SEARCH-REPORT | US2007037914 |
| INTERNATIONAL-SEARCH-REPORT | WO0026295 |
| INTERNATIONAL-SEARCH-REPORT | WO2004060994 |
| INTERNATIONAL-SEARCH-REPORT | WO2005014713 |
| OPPOSITION | EP0457455 |
| OPPOSITION | EP0527589 |
| OPPOSITION | EP0640649 |
| OPPOSITION | EP0863183 |
| OPPOSITION | EP1344793 |
| OPPOSITION | EP1477525 |
| OPPOSITION | EP1726603 |
| OPPOSITION | EP2075284 |
| OPPOSITION | US2004122196 |
| OPPOSITION | US6162887 |
| OPPOSITION | WO2006053661 |
| OPPOSITION | WO2017003762 |
| OTHER | EP0527589 |
| OTHER | WO2017003762 |
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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Search/Exam
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French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Annex
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Non-patent literature filed by a third party
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Intention to grant (signatures)
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Text intended for grant (clean copy)
Search/Exam
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(Electronic) Receipt
Search/Exam
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Amended claims with annotations
Search/Exam
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Amended description with annotations
Search/Exam
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Claims
Search/Exam
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Description
Search/Exam
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Letter accompanying subsequently filed items
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Annex to the communication
Search/Exam
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Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Observations by third parties
Search/Exam
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Patent document filed by a Third party
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Patent document filed by a Third party
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(Electronic) Receipt
Search/Exam
Jun 28, 2017
Amended claims with annotations
Search/Exam
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Amended description with annotations
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Claims
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Description
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Request for correction of client data
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Intention to grant (signatures)
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Apr 11, 2017
Text intended for grant (clean copy)
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Amended description with annotations
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Description
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Communication from the Examining Division
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Feb 19, 2014
Examination started
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Communication to designated inventor
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(Electronic) Receipt
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Nov 6, 2012
Request for entry into the European phase
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Oct 19, 2012
Information on entry into European phase
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May 7, 2012
CDS Clean up - amended applicant details
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Mar 22, 2012
Request for correction
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Jan 5, 2012
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Copy of the international search report
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Published international application - A1
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Abstract
PCTISA
Jun 14, 2011
Claims
PCTISA
Jun 14, 2011
Description
PCTISA