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The patent EP3356444 was granted to Evonik Degussa on Aug 26, 2020. The application was filed on Sep 29, 2016 under application number EP16775665A. 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 |
|---|---|---|---|
| WACKER CHEMIE | May 18, 2021 | MIESKES | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102005045228 |
| DESCRIPTION | DE19529124 |
| DESCRIPTION | DE2356768 |
| DESCRIPTION | DE3412648 |
| DESCRIPTION | EP0140186 |
| DESCRIPTION | US4772672 |
| DESCRIPTION | WO2008074491 |
| DESCRIPTION | WO2008131715 |
| DESCRIPTION | WO9211328 |
| DESCRIPTION | WO9315849 |
| INTERNATIONAL-SEARCH-REPORT | EP2518095 |
| OPPOSITION | DE102011006130 |
| OPPOSITION | DE102011081264 |
| OPPOSITION | DE102012214427 |
| OPPOSITION | DE102013213835 |
| OPPOSITION | DE102014207508 |
| OPPOSITION | WO2015158624 |
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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Means of redress
OPPO
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Description
OPPO
May 31, 2022
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Sep 7, 2020
Jul 30, 2020
Decision to grant a European patent
Search/Exam
Jul 17, 2020
(Electronic) Receipt
Search/Exam
Jul 17, 2020
English translation of the claims
Search/Exam
Jul 17, 2020
Filing of the translations of the claims
Search/Exam
Jul 17, 2020
French translation of claims
Search/Exam
Jul 17, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 26, 2020
Mar 26, 2020
Mar 26, 2020
Intention to grant (signatures)
Search/Exam
Mar 26, 2020
Text intended for grant (clean copy)
Search/Exam
Mar 26, 2020
Mar 11, 2020
Examination started
Search/Exam
Nov 12, 2019
Nov 6, 2019
Nov 6, 2019
May 3, 2019
Apr 26, 2019
(Electronic) Receipt
Search/Exam
Apr 26, 2019
General authorisation
Search/Exam
Apr 26, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 26, 2019
Nov 5, 2018
(Electronic) Receipt
Search/Exam
Nov 5, 2018
Letter accompanying subsequently filed items
Search/Exam
Nov 5, 2018
Reply to Written Opinion prepared by the EPO
Search/Exam
Jul 11, 2018
May 8, 2018
May 4, 2018
Communication to designated inventor
Search/Exam
May 4, 2018
Communication to designated inventor
Search/Exam
May 4, 2018
Communication to designated inventor
Search/Exam
May 4, 2018
Communication to designated inventor
Search/Exam
May 4, 2018
Communication to designated inventor
Search/Exam
May 4, 2018
Communication to designated inventor
Search/Exam
May 4, 2018
Communication to designated inventor
Search/Exam
May 1, 2018
Priority search results copy provided by EPO
Search/Exam
Apr 26, 2018
Mar 15, 2018
(Electronic) Receipt
Search/Exam
Mar 15, 2018
Request for entry into the European phase
Search/Exam
Feb 9, 2018
Information on entry into European phase
Search/Exam
Apr 25, 2017
Apr 6, 2017
Copy of the international search report
Search/Exam
Apr 6, 2017
Published international application - A1
Search/Exam
Dec 1, 2016
ISR: cited documents
PCTISA
Dec 1, 2016
Nov 30, 2016
Nov 30, 2016
Nov 30, 2016
Oct 18, 2016
Oct 17, 2016
Oct 7, 2016
Oct 7, 2016
Oct 4, 2016
Oct 4, 2016
Sep 29, 2016
(Electronic) Receipt
PCTRO
Sep 29, 2016
Abstract
PCTRO
Sep 29, 2016
Claims
PCTRO
Sep 29, 2016
Description
PCTRO
Sep 29, 2016
Sep 29, 2016
Sep 29, 2016