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The patent EP2635634 was granted to Nalco on Mar 22, 2017. The application was filed on Nov 1, 2011 under application number EP11838677A. 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 |
|---|---|---|---|
| BASF | Dec 18, 2017 | INGRASSIA | ADMISSIBLE |
| BASF | Dec 18, 2017 | LKGLOBAL UK | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP0151994 |
| INTERNATIONAL-SEARCH-REPORT | US2006142535 |
| INTERNATIONAL-SEARCH-REPORT | US2011146925 |
| INTERNATIONAL-SEARCH-REPORT | US6238521 |
| INTERNATIONAL-SEARCH-REPORT | US7641766 |
| OPPOSITION | EP0151994 |
| OPPOSITION | US7641766 |
| OPPOSITION | WO0015906 |
| OPPOSITION | WO2008028865 |
| OPPOSITION | WO2008141093 |
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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(Electronic) Receipt
Appeal
Nov 14, 2022
(Electronic) Receipt
Appeal
Nov 14, 2022
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Oct 26, 2022
(Electronic) Receipt
Appeal
Oct 26, 2022
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Dec 30, 2019
(Electronic) Receipt
Appeal
Dec 30, 2019
Dec 30, 2019
Dec 30, 2019
Dec 30, 2019
Dec 30, 2019
Dec 30, 2019
Reply to appeal
Appeal
Nov 12, 2019
Aug 23, 2019
Aug 15, 2019
(Electronic) Receipt
Appeal
Aug 15, 2019
Aug 15, 2019
Aug 15, 2019
Jun 19, 2019
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Jun 14, 2019
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Jun 14, 2019
Processing of an appeal
Appeal
Jun 13, 2019
(Electronic) Receipt
Appeal
Jun 13, 2019
Jun 13, 2019
Notice of appeal
Appeal
Jun 7, 2019
Jun 7, 2019
Apr 23, 2019
Apr 18, 2019
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Means of redress
OPPO
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Claims
OPPO
Jan 25, 2019
Claims
OPPO
Jan 25, 2019
Claims
OPPO
Jan 25, 2019
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Claims
OPPO
May 25, 2018
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Jan 16, 2018
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Dec 22, 2017
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Mar 22, 2017
Feb 23, 2017
Decision to grant a European patent
Search/Exam
Feb 13, 2017
(Electronic) Receipt
Search/Exam
Feb 13, 2017
Filing of the translations of the claims
Search/Exam
Feb 13, 2017
French translation of claims
Search/Exam
Feb 13, 2017
German translation of the claims
Search/Exam
Feb 13, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 19, 2016
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Oct 19, 2016
Intention to grant (signatures)
Search/Exam
Oct 19, 2016
Text intended for grant (clean copy)
Search/Exam
Oct 19, 2016
Jun 21, 2016
(Electronic) Receipt
Search/Exam
Jun 21, 2016
Description
Search/Exam
Jun 21, 2016
Letter accompanying subsequently filed items
Search/Exam
Jun 21, 2016
Apr 14, 2016
Annex to the communication
Search/Exam
Apr 14, 2016
Communication from the Examining Division
Search/Exam
Apr 8, 2016
Examination started
Search/Exam
Mar 18, 2016
(Electronic) Receipt
Search/Exam
Mar 18, 2016
Mar 18, 2016
Amended claims with annotations
Search/Exam
Mar 18, 2016
Amendments received before examination
Search/Exam
Mar 18, 2016
Letter accompanying subsequently filed items
Search/Exam
Oct 8, 2015
Sep 21, 2015
Sep 21, 2015
European search opinion
Search/Exam
Sep 21, 2015
Supplementary European search report
Search/Exam
Sep 14, 2015
Search started
Search/Exam
Dec 4, 2014
Submission concerning representation
Search/Exam
Aug 14, 2013
Jun 11, 2013
Jun 7, 2013
Communication to designated inventor
Search/Exam
Jun 7, 2013
Communication to designated inventor
Search/Exam
May 24, 2013
May 22, 2013
(Electronic) Receipt
Search/Exam
May 22, 2013
Request for entry into the European phase
Search/Exam
Mar 15, 2013
Information on entry into European phase
Search/Exam
Jul 19, 2012
Copy of the international search report
Search/Exam
Jul 19, 2012
Jun 1, 2012
May 10, 2012
Published international application - A2
Search/Exam