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The patent EP3172261 was granted to Momentive Performance Materials on May 4, 2022. The application was filed on Jul 20, 2015 under application number EP15788316A. 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 |
|---|---|---|---|
| EVONIK OPERATIONS | Jul 15, 2019 | F & E PATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102008025261 |
| DESCRIPTION | DE3741946 |
| DESCRIPTION | DE3924193 |
| DESCRIPTION | EP0250823 |
| DESCRIPTION | EP0574912 |
| DESCRIPTION | EP0635510 |
| DESCRIPTION | EP1179534 |
| DESCRIPTION | EP1533315 |
| DESCRIPTION | EP2296804 |
| DESCRIPTION | WO2011107360 |
| INTERNATIONAL-SEARCH-REPORT | EP0635510 |
| OPPOSITION | DE102008025261 |
| OPPOSITION | EP2296804 |
| OPPOSITION | US2012071678 |
| OPPOSITION | US3012006 |
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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Apr 7, 2022
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Means of redress
OPPO
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Feb 5, 2021
Document concerning representation
Search/Exam
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Description
OPPO
Jan 19, 2021
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Acknowledgement of a document
Search/Exam
Nov 10, 2020
Acknowledgement of a document
Search/Exam
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OPPO
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OPPO
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OPPO
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OPPO
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OPPO
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Claims
OPPO
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OPPO
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Nov 5, 2018
Sep 27, 2018
Decision to grant a European patent
Search/Exam
Sep 11, 2018
(Electronic) Receipt
Search/Exam
Sep 11, 2018
English translation of the claims
Search/Exam
Sep 11, 2018
Filing of the translations of the claims
Search/Exam
Sep 11, 2018
French translation of claims
Search/Exam
Sep 11, 2018
Letter accompanying subsequently filed items
Search/Exam
May 14, 2018
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Intention to grant (signatures)
Search/Exam
May 14, 2018
Text intended for grant (clean copy)
Search/Exam
May 14, 2018
Mar 28, 2018
Examination started
Search/Exam
Nov 28, 2017
(Electronic) Receipt
Search/Exam
Nov 28, 2017
Letter accompanying subsequently filed items
Search/Exam
Nov 28, 2017
Oct 18, 2017
Sep 7, 2017
(Electronic) Receipt
Search/Exam
Sep 7, 2017
(Electronic) Receipt
Search/Exam
Sep 7, 2017
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Amended claims with annotations
Search/Exam
Sep 7, 2017
Amendments received before examination
Search/Exam
Sep 7, 2017
Amendments received before examination
Search/Exam
Sep 7, 2017
Annex
Search/Exam
Sep 7, 2017
Letter accompanying subsequently filed items
Search/Exam
Sep 7, 2017
Letter accompanying subsequently filed items
Search/Exam
May 4, 2017
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Refund of fees
Search/Exam
Apr 5, 2017
(Electronic) Receipt
Search/Exam
Apr 5, 2017
Letter accompanying subsequently filed items
Search/Exam
Apr 5, 2017
Letter concerning the inventor
Search/Exam
Mar 30, 2017
Mar 24, 2017
Letter which had not been notified
Search/Exam
Mar 1, 2017
Feb 27, 2017
Communication to designated inventor
Search/Exam
Feb 27, 2017
Communication to designated inventor
Search/Exam
Feb 27, 2017
Communication to designated inventor
Search/Exam
Feb 7, 2017
Jan 18, 2017
(Electronic) Receipt
Search/Exam
Jan 18, 2017
Request for entry into the European phase
Search/Exam
Jan 16, 2017
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Jan 16, 2017
Notification of the recording of a change
Search/Exam
Jan 16, 2017
Notification of the recording of a change
Search/Exam
Dec 2, 2016
Information on entry into European phase
Search/Exam
Feb 16, 2016
Jan 28, 2016
Copy of the international search report
Search/Exam
Jan 28, 2016
Published international application - A1
Search/Exam
Dec 16, 2015
ISR: cited documents
PCTISA
Dec 16, 2015
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Abstract
PCTISA
Nov 6, 2015
Claims
PCTISA
Nov 6, 2015
Description
PCTISA
Nov 6, 2015
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