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The patent EP2997051 was granted to Evonik Degussa on Jul 16, 2025. The application was originally filed on Apr 29, 2014 under application number EP14723383A. 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 |
|---|---|---|---|
| NIPPON SHOKUBAI | May 26, 2021 | MAI BESIER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | EP0744435 |
| INTERNATIONAL-SEARCH-REPORT | US2005137546 |
| INTERNATIONAL-SEARCH-REPORT | WO2012143235 |
| INTERNATIONAL-SEARCH-REPORT | WO2013072268 |
| OPPOSITION | EP0744435 |
| OPPOSITION | EP0872491 |
| OPPOSITION | EP1570869 |
| OPPOSITION | EP2395029 |
| OPPOSITION | JPH1199602 |
| OPPOSITION | WO2012143235 |
| OPPOSITION | WO2013072268 |
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 20, 2025
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Jun 11, 2025
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Mar 24, 2025
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Refund of fees
Appeal
Mar 19, 2025
Mar 18, 2025
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(Electronic) Receipt
Appeal
Mar 13, 2025
Mar 13, 2025
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Mar 12, 2025
(Electronic) Receipt
Appeal
Mar 12, 2025
(Electronic) Receipt
Appeal
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Mar 12, 2025
Withdrawal of an appeal
Appeal
Nov 25, 2024
Nov 22, 2024
Nov 22, 2024
Nov 20, 2024
(Electronic) Receipt
Appeal
Nov 20, 2024
General enquiry
Appeal
Nov 20, 2024
Nov 20, 2024
Nov 20, 2024
Aug 30, 2024
Aug 30, 2024
Aug 30, 2024
Aug 27, 2024
(Electronic) Receipt
Appeal
Aug 27, 2024
Aug 27, 2024
Jul 17, 2024
Jul 12, 2024
(Electronic) Receipt
Appeal
Jul 12, 2024
Jul 12, 2024
Jun 28, 2024
Jun 28, 2024
Jun 28, 2024
Jun 28, 2024
Jun 25, 2024
Jun 14, 2024
Aug 1, 2023
Jul 27, 2023
(Electronic) Receipt
Appeal
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
May 4, 2023
May 4, 2023
Apr 26, 2023
(Electronic) Receipt
Appeal
Apr 26, 2023
Apr 26, 2023
Notice of appeal
Appeal
Apr 6, 2023
Apr 4, 2023
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
Mar 30, 2023
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Mar 30, 2023
Means of redress
OPPO
Mar 30, 2023
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Sep 7, 2020
Jul 30, 2020
Decision to grant a European patent
Search/Exam
Jul 16, 2020
(Electronic) Receipt
Search/Exam
Jul 16, 2020
English translation of the claims
Search/Exam
Jul 16, 2020
Filing of the translations of the claims
Search/Exam
Jul 16, 2020
French translation of claims
Search/Exam
Jul 16, 2020
Letter accompanying subsequently filed items
Search/Exam
May 19, 2020
May 19, 2020
May 19, 2020
Intention to grant (signatures)
Search/Exam
May 19, 2020
Text intended for grant (clean copy)
Search/Exam
May 19, 2020
Feb 10, 2020
(Electronic) Receipt
Search/Exam
Feb 10, 2020
Amended description with annotations
Search/Exam
Feb 10, 2020
Description
Search/Exam
Feb 10, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 10, 2020
Feb 5, 2020
Annex to the communication
Search/Exam
Feb 5, 2020
Communication from the Examining Division
Search/Exam
Nov 12, 2019
Nov 6, 2019
Nov 6, 2019
Oct 16, 2019
(Electronic) Receipt
Search/Exam
Oct 16, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 16, 2019
Oct 10, 2019
Annex to the communication
Search/Exam
Oct 10, 2019
Communication from the Examining Division
Search/Exam
Jul 5, 2019
(Electronic) Receipt
Search/Exam
Jul 5, 2019
Amended claims with annotations
Search/Exam
Jul 5, 2019
Claims
Search/Exam
Jul 5, 2019
Letter accompanying subsequently filed items
Search/Exam
Jul 5, 2019
Mar 15, 2019
Annex to the communication
Search/Exam
Mar 15, 2019
Communication from the Examining Division
Search/Exam
Mar 8, 2019
Examination started
Search/Exam
Jan 28, 2019
Submission concerning representation
Search/Exam
Jan 24, 2019
Jan 16, 2019
Jan 14, 2019
Oct 26, 2017
(Electronic) Receipt
Search/Exam
Oct 26, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2017
Oct 26, 2017
Oct 26, 2017
Oct 26, 2017
Priority search results
Search/Exam
Oct 26, 2017
Sep 19, 2017
Aug 2, 2017
Refund of fees
Search/Exam
Jul 19, 2017
(Electronic) Receipt
Search/Exam
Jul 19, 2017
Jul 19, 2017
Amended claims with annotations
Search/Exam
Jul 19, 2017
Amendments received before examination
Search/Exam
Jul 19, 2017
Letter accompanying subsequently filed items
Search/Exam
Jul 19, 2017
Feb 3, 2017
Feb 24, 2016
Dec 18, 2015
Communication to designated inventor
Search/Exam
Dec 18, 2015
Communication to designated inventor
Search/Exam
Dec 18, 2015
Communication to designated inventor
Search/Exam
Dec 1, 2015
Nov 30, 2015
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Citation filed by a third party
Search/Exam
Nov 24, 2015
Observations by third parties
Search/Exam
Nov 12, 2015
(Electronic) Receipt
Search/Exam
Nov 12, 2015
Priority search results
Search/Exam
Nov 12, 2015
Request for entry into the European phase
Search/Exam
Sep 25, 2015
Information on entry into European phase
Search/Exam
Jun 3, 2015
Jun 3, 2015
Notification of the recording of a change
Search/Exam
Dec 8, 2014
Nov 20, 2014
Copy of the international search report
Search/Exam
Nov 20, 2014
Published international application - A1
Search/Exam
Sep 11, 2014
Sep 11, 2014
Sep 11, 2014
Apr 29, 2014
(Electronic) Receipt
PCTRO
Apr 29, 2014
Abstract
PCTRO
Apr 29, 2014
Claims
PCTRO
Apr 29, 2014
Description
PCTRO