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The patent EP3850049 was granted to Momentive Performance Materials on Nov 5, 2025. The application was filed on Sep 12, 2019 under application number EP19765521A. 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 |
|---|---|---|---|
| THE DOW CHEMICAL | Dec 1, 2023 | BECK GREENER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2005344102 |
| DESCRIPTION | US2008281055 |
| DESCRIPTION | US2009197100 |
| DESCRIPTION | US2011009565 |
| DESCRIPTION | US2011009573 |
| DESCRIPTION | US2013158281 |
| DESCRIPTION | US2018015449 |
| DESCRIPTION | US2018201634 |
| DESCRIPTION | US3159601 |
| DESCRIPTION | US3159662 |
| DESCRIPTION | US3197432 |
| DESCRIPTION | US3220972 |
| DESCRIPTION | US3419593 |
| DESCRIPTION | US3527659 |
| DESCRIPTION | US3715334 |
| DESCRIPTION | US3775452 |
| DESCRIPTION | US3814730 |
| DESCRIPTION | US3899515 |
| DESCRIPTION | US4381396 |
| DESCRIPTION | US5015700 |
| DESCRIPTION | US5109095 |
| DESCRIPTION | US5308887 |
| DESCRIPTION | US5942557 |
| DESCRIPTION | US6743884 |
| DESCRIPTION | US7090923 |
| DESCRIPTION | US7199205 |
| DESCRIPTION | US7842394 |
| DESCRIPTION | US7846550 |
| DESCRIPTION | US7906605 |
| DESCRIPTION | US8343632 |
| DESCRIPTION | US9371339 |
| DESCRIPTION | US9387468 |
| DESCRIPTION | US9487639 |
| DESCRIPTION | US9562149 |
| DESCRIPTION | US9890182 |
| DESCRIPTION | US9993812 |
| DESCRIPTION | WO2009084730 |
| DESCRIPTION | WO2009084733 |
| DESCRIPTION | WO2011006044 |
| DESCRIPTION | WO2011006049 |
| DESCRIPTION | WO2011107592 |
| DESCRIPTION | WO2013090548 |
| DESCRIPTION | WO2013158272 |
| DESCRIPTION | WO2017012714 |
| INTERNATIONAL-SEARCH-REPORT | US2004161618 |
| INTERNATIONAL-SEARCH-REPORT | WO2011081165 |
| INTERNATIONAL-SEARCH-REPORT | WO2017051084 |
| OPPOSITION | US2002087019 |
| OPPOSITION | US2004161618 |
| OPPOSITION | US2013320392 |
| OPPOSITION | US2016319079 |
| OPPOSITION | WO2011081165 |
| OPPOSITION | WO2015167963 |
| OPPOSITION | WO2017051084 |
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
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Letter which had not been notified
Search/Exam
Feb 9, 2023
Decision to grant a European patent
Search/Exam
Jan 23, 2023
(Electronic) Receipt
Search/Exam
Jan 23, 2023
Filing of the translations of the claims
Search/Exam
Jan 23, 2023
French translation of claims
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Jan 23, 2023
German translation of the claims
Search/Exam
Jan 23, 2023
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Sep 15, 2022
Text intended for grant (clean copy)
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Examination started
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Priority search results copy provided by EPO
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(Electronic) Receipt
Search/Exam
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Request for entry into the European phase
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Information on entry into European phase
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Copy of the international search report
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Published international application - A1
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Sep 18, 2019
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(Electronic) Receipt
PCTRO
Sep 12, 2019
Abstract
PCTRO
Sep 12, 2019
Claims
PCTRO
Sep 12, 2019
Description
PCTRO
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