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The patent EP2189551 was granted to Dipsol Chemicals on Jul 5, 2017. The application was filed on Aug 4, 2008 under application number EP08826984A. 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 |
|---|---|---|---|
| DR HESSE & CIE | Apr 5, 2018 | DOMPATENT VON KREISLER SELTING WERNER | ADMISSIBLE |
| DR HESSE & CIE | Apr 5, 2018 | DOMPATENT VON PATENT UND RECHTSANWALTEN | ADMISSIBLE |
| DR ING MAX SCHLOTTER | Apr 5, 2018 | HOFFMANN EITLE | ADMISSIBLE |
| HILLEBRAND CHEMICALS | Apr 5, 2018 | TILMANN | ADMISSIBLE |
| JENKINS | Apr 5, 2018 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2000199074 |
| INTERNATIONAL-SEARCH-REPORT | JP2002226981 |
| INTERNATIONAL-SEARCH-REPORT | JP2005206872 |
| INTERNATIONAL-SEARCH-REPORT | JP2005240084 |
| INTERNATIONAL-SEARCH-REPORT | JP2006028547 |
| INTERNATIONAL-SEARCH-REPORT | WO2005085497 |
| OPPOSITION | EP0907762 |
| OPPOSITION | EP1318214 |
| OPPOSITION | JP2005240084 |
| OPPOSITION | JP2006028547 |
| OPPOSITION | JPS507469 |
| OPPOSITION | US2007243397 |
| OPPOSITION | US6719852 |
| OPPOSITION | US6858098 |
| OPPOSITION | US6858321 |
| OPPOSITION | WO02061174 |
| SEARCH | JP2005240084 |
| SEARCH | JP2006028547 |
| SEARCH | JP2006274321 |
| SEARCH | JPH10176279 |
| SEARCH | WO02061174 |
| SEARCH | WO2009007208 |
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 1, 2021
May 28, 2021
May 27, 2021
Advice of delivery
Appeal
May 27, 2021
May 27, 2021
May 27, 2021
Refund of fees
Search/Exam
May 25, 2021
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(Electronic) Receipt
Appeal
May 17, 2021
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Withdrawal of an appeal
Appeal
Feb 23, 2021
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(Electronic) Receipt
Appeal
Feb 18, 2021
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(Electronic) Receipt
Appeal
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RO101 Declaration
Appeal
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Appeal
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Appeal
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Appeal
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Appeal
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Appeal
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Notice of appeal
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Decision to grant a European patent
Search/Exam
May 26, 2017
(Electronic) Receipt
Search/Exam
May 26, 2017
Filing of the translations of the claims
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May 26, 2017
French translation of claims
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May 26, 2017
German translation of the claims
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May 26, 2017
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Jan 19, 2017
Apr 5, 2016
(Electronic) Receipt
Search/Exam
Apr 5, 2016
Amended claims with annotations
Search/Exam
Apr 5, 2016
Claims
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Apr 5, 2016
Letter accompanying subsequently filed items
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Apr 5, 2016
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Letter accompanying subsequently filed items
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Feb 12, 2016
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Annex to the communication
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Oct 2, 2015
Communication from the Examining Division
Search/Exam
Jan 27, 2014
(Electronic) Receipt
Search/Exam
Jan 27, 2014
Amended claims with annotations
Search/Exam
Jan 27, 2014
Claims
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Letter accompanying subsequently filed items
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Jan 27, 2014
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Sep 20, 2013
Communication from the Examining Division
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Submission concerning representation
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Oct 4, 2011
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Amended claims with annotations
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Oct 4, 2011
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Sep 29, 2011
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Amended claims with annotations
Search/Exam
Sep 29, 2011
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Search/Exam
Mar 24, 2011
Mar 7, 2011
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European search opinion
Search/Exam
Mar 7, 2011
Supplementary European search report
Search/Exam
Jun 30, 2010
Submission concerning representation
Search/Exam
Apr 28, 2010
Notification of forthcoming publication
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Mar 17, 2010
Mar 10, 2010
Feb 26, 2010
(Electronic) Receipt
Search/Exam
Feb 26, 2010
Abstract
Search/Exam
Feb 26, 2010
Annex
Search/Exam
Feb 26, 2010
Claims
Search/Exam
Feb 26, 2010
Description
Search/Exam
Feb 26, 2010
Request for entry into the European phase
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Feb 26, 2010
Submission concerning representation
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Feb 25, 2010
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Information on entry into European phase
Search/Exam
Mar 3, 2009
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Feb 12, 2009
Copy of the international search report
Search/Exam
Feb 12, 2009
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International publication pamphlet
Search/Exam