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The patent EP3665459 was granted to Piezocryst Advanced Sensorics on Mar 26, 2025. The application was filed on Aug 7, 2018 under application number EP18759239A. 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 |
|---|---|---|---|
| KISTLER INSTRUMENTE | Oct 11, 2022 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | AT371255B |
| INTERNATIONAL-SEARCH-REPORT | DE10217164 |
| INTERNATIONAL-SEARCH-REPORT | JPS59216028 |
| INTERNATIONAL-SEARCH-REPORT | US2988728 |
| INTERNATIONAL-SEARCH-REPORT | US4052628 |
| OPPOSITION | CN104817326 |
| OPPOSITION | DE3824849 |
| OPPOSITION | JP2013174553 |
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 27, 2025
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Decision to grant a European patent
Search/Exam
Dec 1, 2021
(Electronic) Receipt
Search/Exam
Dec 1, 2021
English translation of the claims
Search/Exam
Dec 1, 2021
Filing of the translations of the claims
Search/Exam
Dec 1, 2021
French translation of claims
Search/Exam
Dec 1, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2021
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Intention to grant (signatures)
Search/Exam
Oct 26, 2021
Text intended for grant (clean copy)
Search/Exam
Oct 26, 2021
Jun 9, 2021
(Electronic) Receipt
Search/Exam
Jun 9, 2021
Amended description with annotations
Search/Exam
Jun 9, 2021
Description
Search/Exam
Jun 9, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 9, 2021
May 17, 2021
Annex to the communication
Search/Exam
May 17, 2021
Communication from the Examining Division
Search/Exam
May 10, 2021
Examination started
Search/Exam
May 20, 2020
May 7, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
(Electronic) Receipt
Search/Exam
Apr 29, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 29, 2020
Letter concerning the inventor
Search/Exam
Apr 15, 2020
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Letter which had not been notified
Search/Exam
Mar 13, 2020
Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
Mar 13, 2020
Communication to designated inventor
Search/Exam
Mar 4, 2020
(Electronic) Receipt
Search/Exam
Mar 4, 2020
Mar 4, 2020
Amended claims with annotations
Search/Exam
Mar 4, 2020
Amendments received before examination
Search/Exam
Mar 4, 2020
Request for entry into the European phase
Search/Exam
Feb 26, 2020
Dec 20, 2019
Information on entry into European phase
Search/Exam
Mar 5, 2019
Feb 14, 2019
Copy of the international search report
Search/Exam
Feb 14, 2019
Copy of the international search report
Search/Exam
Feb 14, 2019
Published international application - A1
Search/Exam
Nov 16, 2018
ISR: cited documents
PCTISA
Nov 16, 2018
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Abstract
PCTISA
Aug 21, 2018
Claims
PCTISA
Aug 21, 2018
Description
PCTISA
Aug 21, 2018
Drawings
PCTISA
Aug 21, 2018