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The patent EP2857437 was granted to Evonik Degussa on Jan 15, 2025. The application was filed on Sep 29, 2014 under application number EP14186745A. 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 |
|---|---|---|---|
| ARKEMA FRANCE | Mar 19, 2020 | ARKEMA PATENT | ADMISSIBLE |
| EMS CHEMIE | Mar 18, 2020 | PFENNING | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE1595150 |
| DESCRIPTION | EP0619336 |
| DESCRIPTION | EP0725101 |
| DESCRIPTION | EP0837087 |
| DESCRIPTION | EP1120443 |
| DESCRIPTION | EP1595907 |
| DESCRIPTION | WO2008025729 |
| EXAMINATION | EP1595907 |
| EXAMINATION | EP2057015 |
| EXAMINATION | EP2816072 |
| EXAMINATION | US2010140846 |
| OPPOSITION | EP1120443 |
| OPPOSITION | EP1227131 |
| OPPOSITION | EP1369447 |
| OPPOSITION | EP1595907 |
| OPPOSITION | EP1942147 |
| OPPOSITION | EP2460858 |
| OPPOSITION | EP2608276 |
| OPPOSITION | JPS492367B |
| OPPOSITION | US2011135860 |
| OPPOSITION | US5360891 |
| OPPOSITION | WO2008006991 |
| OPPOSITION | WO2009156323 |
| SEARCH | DE4310970 |
| SEARCH | EP0837087 |
| SEARCH | US2007122615 |
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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Refund of fees
Appeal
Oct 10, 2024
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Refund of fees
Appeal
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Sep 27, 2024
(Electronic) Receipt
Appeal
Sep 27, 2024
Withdrawal of an appeal
Appeal
Sep 26, 2024
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(Electronic) Receipt
Appeal
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Withdrawal of an appeal
Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Aug 8, 2022
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Notice of appeal
Appeal
Aug 5, 2022
(Electronic) Receipt
Appeal
Aug 5, 2022
(Electronic) Receipt
Appeal
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Notice of appeal
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Nov 12, 2019
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Jul 1, 2019
May 23, 2019
Decision to grant a European patent
Search/Exam
May 6, 2019
(Electronic) Receipt
Search/Exam
May 6, 2019
English translation of the claims
Search/Exam
May 6, 2019
Filing of the translations of the claims
Search/Exam
May 6, 2019
French translation of claims
Search/Exam
May 6, 2019
Letter accompanying subsequently filed items
Search/Exam
Jan 28, 2019
Submission concerning representation
Search/Exam
Jan 24, 2019
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Intention to grant (signatures)
Search/Exam
Jan 9, 2019
Text intended for grant (clean copy)
Search/Exam
Jan 9, 2019
Jan 4, 2018
(Electronic) Receipt
Search/Exam
Jan 4, 2018
Amended claims with annotations
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Jan 4, 2018
Amended description with annotations
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Jan 4, 2018
Claims
Search/Exam
Jan 4, 2018
Description
Search/Exam
Jan 4, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 4, 2018
Dec 18, 2017
Annex to the communication
Search/Exam
Dec 18, 2017
Communication from the Examining Division
Search/Exam
Jan 25, 2017
(Electronic) Receipt
Search/Exam
Jan 25, 2017
Amended claims with annotations
Search/Exam
Jan 25, 2017
Claims
Search/Exam
Jan 25, 2017
Letter accompanying subsequently filed items
Search/Exam
Jan 25, 2017
Sep 22, 2016
Annex to the communication
Search/Exam
Sep 22, 2016
Communication from the Examining Division
Search/Exam
Sep 16, 2016
Examination started
Search/Exam
Oct 13, 2015
(Electronic) Receipt
Search/Exam
Oct 13, 2015
Letter accompanying subsequently filed items
Search/Exam
Oct 13, 2015
Oct 5, 2015
Sep 22, 2015
(Electronic) Receipt
Search/Exam
Sep 22, 2015
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Amended claims with annotations
Search/Exam
Sep 22, 2015
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Amended description with annotations
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Sep 22, 2015
Amendments received before examination
Search/Exam
Sep 22, 2015
Letter accompanying subsequently filed items
Search/Exam
Jul 10, 2015
Jun 16, 2015
Apr 13, 2015
Mar 11, 2015
Notification of forthcoming publication
Search/Exam
Feb 11, 2015
Feb 11, 2015
European search opinion
Search/Exam
Feb 11, 2015
European search report
Search/Exam
Jan 28, 2015
Search started
Search/Exam
Nov 21, 2014
Communication to designated inventor
Search/Exam
Nov 21, 2014
Communication to designated inventor
Search/Exam
Nov 21, 2014
Communication to designated inventor
Search/Exam
Nov 21, 2014
Communication to designated inventor
Search/Exam
Oct 29, 2014
Letter concerning the priority
Search/Exam
Oct 29, 2014
Priority document
Search/Exam
Sep 29, 2014
Abstract
Search/Exam
Sep 29, 2014
Sep 29, 2014
Claims
Search/Exam
Sep 29, 2014
Description
Search/Exam
Sep 29, 2014
Designation of inventor
Search/Exam
Sep 29, 2014
Designation of inventor
Search/Exam
Sep 29, 2014
Designation of inventor
Search/Exam
Sep 29, 2014
Designation of inventor
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Sep 29, 2014
Request for grant of a European patent
Search/Exam