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The patent EP3235990 was granted to Westinghouse AIR Brake on Dec 1, 2021. The application was filed on Apr 20, 2017 under application number EP17167415A. 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 |
|---|---|---|---|
| KNORR BREMSE GESELLSCHAFT MIT BESCHRANKTER HAFTUNG | Aug 24, 2022 | WIEDEMANN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | US2005151495 |
| OPPOSITION | DE102005044147 |
| OPPOSITION | DE102009054107 |
| OPPOSITION | DE3539265 |
| OPPOSITION | DE3921158 |
| OPPOSITION | EP0581509 |
| OPPOSITION | EP1542108 |
| OPPOSITION | EP1580861 |
| OPPOSITION | EP2899091 |
| OPPOSITION | US2005151495 |
| OPPOSITION | US5069000 |
| SEARCH | DE3921158 |
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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Decision to grant a European patent
Search/Exam
Oct 20, 2021
(Electronic) Receipt
Search/Exam
Oct 20, 2021
French translation of claims
Search/Exam
Oct 20, 2021
German translation of the claims
Search/Exam
Oct 20, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 23, 2021
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Intention to grant (signatures)
Search/Exam
Jun 23, 2021
Text intended for grant (clean copy)
Search/Exam
Jun 23, 2021
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Authorisation
Search/Exam
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Invitation to file an authorisation
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Nov 25, 2020
Submission concerning representation
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Jan 8, 2020
(Electronic) Receipt
Search/Exam
Jan 8, 2020
Amended claims with annotations
Search/Exam
Jan 8, 2020
Claims
Search/Exam
Jan 8, 2020
Letter accompanying subsequently filed items
Search/Exam
Jan 8, 2020
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Annex to the communication
Search/Exam
Sep 9, 2019
Communication from the Examining Division
Search/Exam
Sep 3, 2019
Examination started
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Apr 25, 2018
(Electronic) Receipt
Search/Exam
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Amended claims with annotations
Search/Exam
Apr 25, 2018
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Amended description with annotations
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Apr 25, 2018
Amendments received before examination
Search/Exam
Apr 25, 2018
Letter accompanying subsequently filed items
Search/Exam
Oct 30, 2017
Sep 27, 2017
Notification of forthcoming publication
Search/Exam
Aug 23, 2017
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European search opinion
Search/Exam
Aug 23, 2017
European search report
Search/Exam
Aug 23, 2017
Information on Search Strategy
Search/Exam
Aug 10, 2017
Search started
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Jun 27, 2017
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Communication to designated inventor
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May 12, 2017
Letter concerning the priority
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May 12, 2017
Priority document
Search/Exam
Apr 20, 2017
Abstract
Search/Exam
Apr 20, 2017
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Claims
Search/Exam
Apr 20, 2017
Description
Search/Exam
Apr 20, 2017
Designation of inventor
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Apr 20, 2017
Drawings
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Apr 20, 2017
Request for grant of a European patent
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