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The patent EP3138820 was granted to Johns Manville on May 8, 2019. The application was filed on Sep 2, 2016 under application number EP16187117A. 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 |
|---|---|---|---|
| SAINT GOBAIN | Feb 5, 2020 | SAINT GOBAIN RECHERCHE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2008276652 |
| DESCRIPTION | US2012104306 |
| DESCRIPTION | US6250916 |
| DESCRIPTION | US8769992 |
| DESCRIPTION | US8973405 |
| DESCRIPTION | US9096453 |
| DESCRIPTION | WO2014189504 |
| OPPOSITION | DE3716687 |
| OPPOSITION | EP0135446 |
| OPPOSITION | EP0426082 |
| OPPOSITION | FR1557797 |
| OPPOSITION | FR2281902 |
| OPPOSITION | US2057393 |
| OPPOSITION | US2593197 |
| OPPOSITION | US5125943 |
| OPPOSITION | WO2011154106 |
| OPPOSITION | WO9725285 |
| OPPOSITION | WO9937591 |
| SEARCH | DE10029983 |
| SEARCH | EP2105415 |
| SEARCH | GB909806 |
| SEARCH | US1610376 |
| SEARCH | US2014007622 |
| SEARCH | US2057393 |
| SEARCH | US3190625 |
| SEARCH | US4203761 |
| SEARCH | US4605437 |
| SEARCH | US4652289 |
| SEARCH | US4877449 |
| SEARCH | WO8200460 |
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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May 20, 2019
Apr 11, 2019
Decision to grant a European patent
Search/Exam
Apr 1, 2019
(Electronic) Receipt
Search/Exam
Apr 1, 2019
Filing of the translations of the claims
Search/Exam
Apr 1, 2019
French translation of claims
Search/Exam
Apr 1, 2019
German translation of the claims
Search/Exam
Apr 1, 2019
Letter accompanying subsequently filed items
Search/Exam
Jan 4, 2019
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Intention to grant (signatures)
Search/Exam
Jan 4, 2019
Text intended for grant (clean copy)
Search/Exam
Jan 4, 2019
Jul 11, 2018
(Electronic) Receipt
Search/Exam
Jul 11, 2018
Amended claims with annotations
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Jul 11, 2018
Claims
Search/Exam
Jul 11, 2018
Letter accompanying subsequently filed items
Search/Exam
Jul 11, 2018
Mar 16, 2018
Annex to the communication
Search/Exam
Mar 16, 2018
Communication from the Examining Division
Search/Exam
Mar 9, 2018
Examination started
Search/Exam
Sep 6, 2017
(Electronic) Receipt
Search/Exam
Sep 6, 2017
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Amended claims with annotations
Search/Exam
Sep 6, 2017
Amendments received before examination
Search/Exam
Sep 6, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 13, 2017
Feb 8, 2017
Notification of forthcoming publication
Search/Exam
Jan 31, 2017
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European search opinion
Search/Exam
Jan 31, 2017
European search report
Search/Exam
Jan 31, 2017
Information on Search Strategy
Search/Exam
Jan 19, 2017
Search started
Search/Exam
Nov 10, 2016
Nov 2, 2016
Oct 26, 2016
Communication to designated inventor
Search/Exam
Sep 2, 2016
Abstract
Search/Exam
Sep 2, 2016
Sep 2, 2016
Claims
Search/Exam
Sep 2, 2016
Description
Search/Exam
Sep 2, 2016
Designation of inventor
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Sep 2, 2016
Drawings
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Sep 2, 2016
Request for grant of a European patent
Search/Exam