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The patent EP3489485 was granted to Pratt & Whitney Canada on Jun 18, 2025. The application was filed on Nov 22, 2018 under application number EP18207838A. 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 |
|---|---|---|---|
| SAFRAN AIRCRAFT ENGINES | Jan 4, 2023 | REGIMBEAU | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
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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Refund of fees
Appeal
Feb 28, 2025
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(Electronic) Receipt
Appeal
Feb 25, 2025
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Withdrawal of an appeal
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Feb 24, 2022
(Electronic) Receipt
Search/Exam
Feb 24, 2022
Filing of the translations of the claims
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Feb 24, 2022
French translation of claims
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Feb 24, 2022
German translation of the claims
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Feb 24, 2022
Letter accompanying subsequently filed items
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Oct 19, 2021
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Intention to grant (signatures)
Search/Exam
Oct 19, 2021
Text intended for grant (clean copy)
Search/Exam
Oct 19, 2021
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(Electronic) Receipt
Search/Exam
Jun 14, 2021
Amended claims with annotations
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Amended description with annotations
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Claims
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Description
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Annex to the communication
Search/Exam
Dec 4, 2020
Communication from the Examining Division
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Nov 26, 2020
Examination started
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Nov 29, 2019
(Electronic) Receipt
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Nov 29, 2019
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Amended claims with annotations
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Nov 29, 2019
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Amended description with annotations
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Nov 29, 2019
Amendments received before examination
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Nov 29, 2019
Letter accompanying subsequently filed items
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Jun 4, 2019
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Notification of forthcoming publication
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European search opinion
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Mar 11, 2019
European search report
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Mar 11, 2019
Information on Search Strategy
Search/Exam
Mar 1, 2019
Search started
Search/Exam
Jan 28, 2019
Jan 22, 2019
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Communication to designated inventor
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Nov 22, 2018
Abstract
Search/Exam
Nov 22, 2018
Nov 22, 2018
Claims
Search/Exam
Nov 22, 2018
Description
Search/Exam
Nov 22, 2018
Designation of inventor
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Nov 22, 2018
Drawings
Search/Exam
Nov 22, 2018
Request for grant of a European patent
Search/Exam