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The patent EP3243205 was granted to Momentive Performance Materials on May 14, 2025. The application was filed on Jan 8, 2016 under application number EP16700691A. 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 |
|---|---|---|---|
| WACKER CHEMIE | Dec 13, 2019 | MIESKES | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | CN103259239 |
| INTERNATIONAL-SEARCH-REPORT | CN103259240 |
| INTERNATIONAL-SEARCH-REPORT | EP1630823 |
| INTERNATIONAL-SEARCH-REPORT | US2004138370 |
| INTERNATIONAL-SEARCH-REPORT | WO03085681 |
| INTERNATIONAL-SEARCH-REPORT | WO2005036563 |
| INTERNATIONAL-SEARCH-REPORT | WO2008076058 |
| INTERNATIONAL-SEARCH-REPORT | WO2013033603 |
| INTERNATIONAL-SEARCH-REPORT | WO2013116196 |
| OPPOSITION | JP2013026048 |
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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OPPO
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OPPO
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OPPO
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Apr 15, 2019
Mar 7, 2019
Decision to grant a European patent
Search/Exam
Feb 15, 2019
(Electronic) Receipt
Search/Exam
Feb 15, 2019
Filing of the translations of the claims
Search/Exam
Feb 15, 2019
French translation of claims
Search/Exam
Feb 15, 2019
German translation of the claims
Search/Exam
Feb 15, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 17, 2018
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Intention to grant (signatures)
Search/Exam
Oct 17, 2018
Text intended for grant (clean copy)
Search/Exam
Oct 17, 2018
Aug 27, 2018
(Electronic) Receipt
Search/Exam
Aug 27, 2018
Amended description with annotations
Search/Exam
Aug 27, 2018
Description
Search/Exam
Aug 27, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 27, 2018
Jul 5, 2018
Annex to the communication
Search/Exam
Jul 5, 2018
Communication from the Examining Division
Search/Exam
Jun 25, 2018
Examination started
Search/Exam
Feb 26, 2018
(Electronic) Receipt
Search/Exam
Feb 26, 2018
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Amended claims with annotations
Search/Exam
Feb 26, 2018
Amendments received before examination
Search/Exam
Feb 26, 2018
Letter accompanying subsequently filed items
Search/Exam
Oct 20, 2017
Communication to designated inventor
Search/Exam
Oct 18, 2017
Oct 5, 2017
Letter concerning the inventor
Search/Exam
Sep 28, 2017
Sep 12, 2017
Letter which had not been notified
Search/Exam
Aug 17, 2017
Aug 14, 2017
Communication to designated inventor
Search/Exam
Aug 14, 2017
Communication to designated inventor
Search/Exam
Aug 14, 2017
Communication to designated inventor
Search/Exam
Aug 14, 2017
Communication to designated inventor
Search/Exam
Jul 24, 2017
May 23, 2017
(Electronic) Receipt
Search/Exam
May 23, 2017
Request for entry into the European phase
Search/Exam
May 19, 2017
Information on entry into European phase
Search/Exam
Aug 1, 2016
Jul 14, 2016
Copy of the international search report
Search/Exam
Jul 14, 2016
Published international application - A1
Search/Exam
Jun 8, 2016
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(Electronic) Receipt
PCTRO
Jan 8, 2016
Abstract
PCTRO
Jan 8, 2016
Claims
PCTRO
Jan 8, 2016
Description
PCTRO
Jan 8, 2016
Jan 8, 2016
Jan 8, 2016