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The patent EP3186146 was granted to Sikorsky Aircraft on Oct 9, 2019. The application was filed on Aug 27, 2015 under application number EP15842277A. 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 |
|---|---|---|---|
| AIRBUS HELICOPTERS | May 27, 2020 | GPI BREVETS | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2015001336 |
| INTERNATIONAL-SEARCH-REPORT | US2455378 |
| INTERNATIONAL-SEARCH-REPORT | US2740483 |
| INTERNATIONAL-SEARCH-REPORT | US2868304 |
| INTERNATIONAL-SEARCH-REPORT | US3490296 |
| INTERNATIONAL-SEARCH-REPORT | US3699771 |
| INTERNATIONAL-SEARCH-REPORT | US4028004 |
| INTERNATIONAL-SEARCH-REPORT | US5127608 |
| INTERNATIONAL-SEARCH-REPORT | US8465257 |
| OPPOSITION | EP2107002 |
| OPPOSITION | EP2759473 |
| OPPOSITION | GB2073114 |
| OPPOSITION | US2010308178 |
| OPPOSITION | US2010310371 |
| OPPOSITION | US2010312421 |
| OPPOSITION | US2011024551 |
| OPPOSITION | US2013079956 |
| OPPOSITION | US2014067166 |
| OPPOSITION | US2740483 |
| OPPOSITION | US4195802 |
| OPPOSITION | US4667909 |
| OPPOSITION | US5213282 |
| OPPOSITION | WO2013169320 |
| SEARCH | EP2759473 |
| SEARCH | GB2073114 |
| SEARCH | US2740483 |
| SEARCH | US4195802 |
| SEARCH | US4667909 |
| SEARCH | US5213282 |
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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Feb 29, 2024
Feb 29, 2024
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Aug 22, 2022
Aug 17, 2022
(Electronic) Receipt
Appeal
Aug 17, 2022
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(Electronic) Receipt
Appeal
May 23, 2022
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Feb 24, 2022
(Electronic) Receipt
Appeal
Feb 24, 2022
Feb 24, 2022
Notice of appeal
Appeal
Feb 17, 2022
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Means of redress
OPPO
Feb 17, 2022
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May 27, 2020
Oct 21, 2019
Sep 12, 2019
Decision to grant a European patent
Search/Exam
Jul 12, 2019
Filing of the translations of the claims
Search/Exam
Jul 12, 2019
French translation of claims
Search/Exam
Jul 12, 2019
German translation of the claims
Search/Exam
Jul 12, 2019
Letter concerning the grant and printing fee
Search/Exam
Mar 13, 2019
Mar 13, 2019
Mar 13, 2019
Intention to grant (signatures)
Search/Exam
Mar 13, 2019
Text intended for grant (clean copy)
Search/Exam
Mar 13, 2019
Feb 4, 2019
Examination started
Search/Exam
Dec 14, 2018
Submission concerning representation
Search/Exam
Oct 18, 2018
Oct 18, 2018
Amended claims with annotations
Search/Exam
Oct 18, 2018
Oct 18, 2018
Amended description with annotations
Search/Exam
Oct 18, 2018
Amendments received before examination
Search/Exam
Apr 13, 2018
Mar 28, 2018
Mar 28, 2018
European search opinion
Search/Exam
Mar 28, 2018
Information on Search Strategy
Search/Exam
Mar 28, 2018
Supplementary European search report
Search/Exam
Mar 9, 2018
Search started
Search/Exam
Jun 8, 2017
May 24, 2017
May 10, 2017
May 10, 2017
Apr 4, 2017
Mar 31, 2017
Communication to designated inventor
Search/Exam
Mar 31, 2017
Communication to designated inventor
Search/Exam
Mar 31, 2017
Communication to designated inventor
Search/Exam
Mar 16, 2017
(Electronic) Receipt
Search/Exam
Mar 16, 2017
Mar 16, 2017
Amended claims with annotations
Search/Exam
Mar 16, 2017
Request for entry into the European phase
Search/Exam
Mar 13, 2017
Jan 27, 2017
Information on entry into European phase
Search/Exam
Jun 16, 2016
Copy of the international search report
Search/Exam
Jun 16, 2016
Apr 13, 2016
Mar 24, 2016
Published international application - A2
Search/Exam