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The patent EP2726558 was granted to Hempel on Nov 20, 2019. The application was originally filed on Jun 29, 2012 under application number EP12805023A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP1867401 |
| INTERNATIONAL-SEARCH-REPORT | US2008166493 |
| INTERNATIONAL-SEARCH-REPORT | US2009270548 |
| INTERNATIONAL-SEARCH-REPORT | US2010062200 |
| INTERNATIONAL-SEARCH-REPORT | WO2008132195 |
| INTERNATIONAL-SEARCH-REPORT | WO2011076856 |
| INTERNATIONAL-SEARCH-REPORT | WO9313179 |
| OPPOSITION | EP2143766 |
| OPPOSITION | JPH11269409 |
| OPPOSITION | US6107381 |
| OPPOSITION | WO2006121937 |
| OPPOSITION | WO2008132196 |
| OPPOSITION | WO2011069111 |
| OPPOSITION | WO9532862 |
| SEARCH | JP2006299132 |
| SEARCH | US5919689 |
| SEARCH | US6559201 |
| SEARCH | WO2006002630 |
| SEARCH | WO9532862 |
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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Oct 24, 2019
Oct 24, 2019
Oct 18, 2019
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Means of redress
OPPO
Apr 3, 2019
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Claims
OPPO
Dec 21, 2018
Claims
OPPO
Dec 21, 2018
Claims
OPPO
Dec 21, 2018
Claims
OPPO
Dec 21, 2018
Claims
OPPO
Dec 21, 2018
Claims
OPPO
Dec 21, 2018
Dec 21, 2018
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Dec 4, 2018
Submission concerning representation
Search/Exam
Aug 6, 2018
Aug 1, 2018
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Jul 23, 2018
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Claims
OPPO
May 1, 2018
May 1, 2018
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Apr 13, 2018
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Authorisation
OPPO
Apr 4, 2018
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Dec 22, 2017
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Mar 9, 2017
Feb 9, 2017
Decision to grant a European patent
Search/Exam
Feb 8, 2017
Refund of fees
Search/Exam
Feb 6, 2017
Decision to allow further processing
Search/Exam
Jan 17, 2017
(Electronic) Receipt
Search/Exam
Jan 17, 2017
Letter accompanying subsequently filed items
Search/Exam
Jan 17, 2017
Letter concerning fees and payments
Search/Exam
Jan 16, 2017
Nov 29, 2016
(Electronic) Receipt
Search/Exam
Nov 29, 2016
Filing of the translations of the claims
Search/Exam
Nov 29, 2016
French translation of claims
Search/Exam
Nov 29, 2016
German translation of the claims
Search/Exam
Nov 29, 2016
Letter accompanying subsequently filed items
Search/Exam
Jul 21, 2016
Jul 21, 2016
Jul 21, 2016
Intention to grant (signatures)
Search/Exam
Jul 21, 2016
Text intended for grant
Search/Exam
Jul 12, 2016
Jun 30, 2016
(Electronic) Receipt
Search/Exam
Jun 30, 2016
Amended claims with annotations
Search/Exam
Jun 30, 2016
Claims
Search/Exam
Jun 30, 2016
Letter accompanying subsequently filed items
Search/Exam
Jun 30, 2016
Feb 25, 2016
Feb 25, 2016
Feb 25, 2016
Intention to grant (signatures)
Search/Exam
Feb 25, 2016
Text intended for grant
Search/Exam
Nov 18, 2015
(Electronic) Receipt
Search/Exam
Nov 18, 2015
Letter accompanying subsequently filed items
Search/Exam
Nov 18, 2015
Aug 25, 2015
Annex to the communication
Search/Exam
Aug 25, 2015
Communication from the Examining Division
Search/Exam
Aug 10, 2015
(Electronic) Receipt
Search/Exam
Aug 10, 2015
Aug 10, 2015
Amended claims with annotations
Search/Exam
Aug 10, 2015
Amendments received before examination
Search/Exam
Aug 10, 2015
Letter accompanying subsequently filed items
Search/Exam
Feb 10, 2015
Jan 22, 2015
Jan 22, 2015
European search opinion
Search/Exam
Jan 22, 2015
Supplementary European search report
Search/Exam
Oct 20, 2014
Priority search results copy provided by EPO
Search/Exam
Oct 20, 2014
Priority search results copy provided by EPO
Search/Exam
Jul 1, 2014
Jun 26, 2014
(Electronic) Receipt
Search/Exam
Jun 26, 2014
Letter accompanying subsequently filed items
Search/Exam
Jun 26, 2014
Apr 9, 2014
Feb 12, 2014
Feb 10, 2014
Communication to designated inventor
Search/Exam
Jan 9, 2014
Jan 9, 2014
Jan 6, 2014
(Electronic) Receipt
Search/Exam
Jan 6, 2014
Request for entry into the European phase
Search/Exam
Nov 8, 2013
Information on entry into European phase
Search/Exam
Aug 28, 2013
Notification of the recording of a change
Search/Exam
Aug 14, 2013
Jun 18, 2013
Notification of election of EPO
Search/Exam
Jan 22, 2013
Jan 22, 2013
Jan 22, 2013
Jan 3, 2013
Copy of the international search report
Search/Exam
Jan 3, 2013
Published international application - A1
Search/Exam