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The patent EP3743466 was granted to DOW Silicones on Nov 17, 2021. The application was filed on Jan 23, 2019 under application number EP19700837A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 |
|---|---|---|---|
| KEEY AEROGEL | Aug 16, 2022 | HEGE | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1515796 |
| DESCRIPTION | EP2663395 |
| DESCRIPTION | KR20100002234 |
| DESCRIPTION | KR20100033396 |
| DESCRIPTION | US2004077738 |
| DESCRIPTION | US2004142168 |
| DESCRIPTION | US2676182 |
| DESCRIPTION | US2893962 |
| DESCRIPTION | US3382205 |
| DESCRIPTION | US6365638 |
| DESCRIPTION | US7144522 |
| DESCRIPTION | WO2007021493 |
| DESCRIPTION | WO2016010253 |
| DESCRIPTION | WO2017069315 |
| INTERNATIONAL-SEARCH-REPORT | CN103525297 |
| INTERNATIONAL-SEARCH-REPORT | CN104152890 |
| INTERNATIONAL-SEARCH-REPORT | EP0249944 |
| INTERNATIONAL-SEARCH-REPORT | EP0260666 |
| INTERNATIONAL-SEARCH-REPORT | US2870108 |
| INTERNATIONAL-SEARCH-REPORT | WO2011000133 |
| OPPOSITION | CN103525297 |
| OPPOSITION | CN104152890 |
| OPPOSITION | EP0249944 |
| OPPOSITION | EP0260666 |
| OPPOSITION | EP1101798 |
| OPPOSITION | EP1515796 |
| OPPOSITION | FR3053263 |
| OPPOSITION | JP2711621B |
| OPPOSITION | KR101137657B |
| OPPOSITION | US2870108 |
| OPPOSITION | US2870109 |
| OPPOSITION | US9777126 |
| OPPOSITION | WO2011000133 |
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.
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Nov 30, 2021
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Decision to grant a European patent
Search/Exam
Oct 11, 2021
(Electronic) Receipt
Search/Exam
Oct 11, 2021
Filing of the translations of the claims
Search/Exam
Oct 11, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 11, 2021
Oct 7, 2021
Sep 29, 2021
(Electronic) Receipt
Search/Exam
Sep 29, 2021
Annexes in respect of a client data request
Search/Exam
Sep 29, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 29, 2021
Sep 20, 2021
Jul 27, 2021
(Electronic) Receipt
Search/Exam
Jul 27, 2021
Annexes in respect of a client data request
Search/Exam
Jul 27, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 27, 2021
Jun 15, 2021
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Jun 15, 2021
Intention to grant (signatures)
Search/Exam
Jun 15, 2021
Text intended for grant (clean copy)
Search/Exam
Jun 15, 2021
Apr 26, 2021
(Electronic) Receipt
Search/Exam
Apr 26, 2021
Amended claims with annotations
Search/Exam
Apr 26, 2021
Amended description with annotations
Search/Exam
Apr 26, 2021
Claims
Search/Exam
Apr 26, 2021
Description
Search/Exam
Apr 26, 2021
French translation of claims
Search/Exam
Apr 26, 2021
German translation of the claims
Search/Exam
Apr 26, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 26, 2021
Dec 15, 2020
Dec 15, 2020
Dec 15, 2020
Intention to grant (signatures)
Search/Exam
Dec 15, 2020
Text intended for grant (clean copy)
Search/Exam
Dec 15, 2020
Dec 7, 2020
Nov 17, 2020
Examination started
Search/Exam
Nov 4, 2020
Sep 1, 2020
Communication to designated inventor
Search/Exam
Sep 1, 2020
Communication to designated inventor
Search/Exam
Sep 1, 2020
Communication to designated inventor
Search/Exam
Aug 27, 2020
Priority search results copy provided by EPO
Search/Exam
Aug 21, 2020
(Electronic) Receipt
Search/Exam
Aug 21, 2020
Aug 21, 2020
Amended claims with annotations
Search/Exam
Aug 21, 2020
Request for entry into the European phase
Search/Exam
Jul 27, 2020
Jun 9, 2020
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Notification of the recording of a change
Search/Exam
Jun 5, 2020
Information on entry into European phase
Search/Exam
Dec 5, 2019
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Dec 3, 2019
Notification of election of EPO
Search/Exam
Nov 19, 2019
Nov 13, 2019
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PCT demand form
PCT2
Nov 6, 2019
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Aug 19, 2019
Aug 1, 2019
Copy of the international search report
Search/Exam
Aug 1, 2019
Published international application - A1
Search/Exam
Feb 12, 2019
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(Electronic) Receipt
PCTRO
Jan 25, 2019
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(Electronic) Receipt
PCTRO
Jan 23, 2019
Abstract
PCTRO
Jan 23, 2019
Claims
PCTRO
Jan 23, 2019
Description
PCTRO
Jan 23, 2019
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