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The patent EP3638556 was granted to Knorr Bremse Systeme FR Schienenfahrzeuge on Jan 1, 2025. The application was filed on Jun 4, 2018 under application number EP18732677A. 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 |
|---|---|---|---|
| ATLAS COPCO | Dec 17, 2021 | VAN MINNEBRUGGEN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1334019 |
| INTERNATIONAL-SEARCH-REPORT | DE102015116148 |
| INTERNATIONAL-SEARCH-REPORT | JP2012154294 |
| INTERNATIONAL-SEARCH-REPORT | US2007077151 |
| OPPOSITION | CN1699754 |
| OPPOSITION | CN200510054802 |
| OPPOSITION | DE102015116148 |
| OPPOSITION | US2007077151 |
| OPPOSITION | US6233954 |
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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OPPO
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Decision to grant a European patent
Search/Exam
Feb 1, 2021
English translation of the claims
Search/Exam
Feb 1, 2021
Filing of the translations of the claims
Search/Exam
Feb 1, 2021
French translation of claims
Search/Exam
Oct 8, 2020
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Intention to grant (signatures)
Search/Exam
Oct 8, 2020
Text intended for grant (clean copy)
Search/Exam
Oct 8, 2020
Sep 17, 2020
Examination started
Search/Exam
Jul 27, 2020
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Amended claims with annotations
Search/Exam
Jul 27, 2020
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Amended description with annotations
Search/Exam
Jul 27, 2020
Amendments received before examination
Search/Exam
Mar 27, 2020
Communication to designated inventor
Search/Exam
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(Electronic) Receipt
Search/Exam
Mar 23, 2020
Letter concerning the inventor
Search/Exam
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Letter which had not been notified
Search/Exam
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
Jan 3, 2020
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(Electronic) Receipt
Search/Exam
Nov 26, 2019
Priority search results
Search/Exam
Nov 26, 2019
Request for entry into the European phase
Search/Exam
Oct 25, 2019
Information on entry into European phase
Search/Exam
Jan 11, 2019
Dec 20, 2018
Copy of the international search report
Search/Exam
Dec 20, 2018
Copy of the international search report
Search/Exam
Dec 20, 2018
Published international application - A1
Search/Exam
Oct 5, 2018
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ISR: cited documents
PCTISA
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(Electronic) Receipt
PCTRO
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(Electronic) Receipt
PCTRO
Jun 4, 2018
Abstract
PCTRO
Jun 4, 2018
Claims
PCTRO
Jun 4, 2018
Description
PCTRO
Jun 4, 2018
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Drawings
PCTRO
Jun 4, 2018