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The patent EP3895712 was granted to ONK Therapeutics on Jun 22, 2022. The application was filed on Dec 11, 2017 under application number EP21160170A. 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 |
|---|---|---|---|
| AMMELBURG | Mar 21, 2023 | FISH & RICHARDSON PC | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2006099875 |
| DESCRIPTION | WO2009077857 |
| DESCRIPTION | WO2011154453 |
| OPPOSITION | CN105384825 |
| OPPOSITION | US2009285799 |
| OPPOSITION | US2010092489 |
| OPPOSITION | WO2011154453 |
| OPPOSITION | WO2014138704 |
| OPPOSITION | WO2015142675 |
| OPPOSITION | WO2016102687 |
| OPPOSITION | WO2016109668 |
| OPPOSITION | WO2016126608 |
| OPPOSITION | WO2016201394 |
| OPPOSITION | WO2016210293 |
| OPPOSITION | WO2017017184 |
| OPPOSITION | WO2017025038 |
| OPPOSITION | WO2018104562 |
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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Dec 19, 2025
Dec 18, 2025
(Electronic) Receipt
Appeal
Dec 18, 2025
Dec 18, 2025
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Sep 1, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jul 7, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Sep 12, 2024
Notice of appeal
Appeal
Sep 12, 2024
Notice of appeal
Appeal
Jul 16, 2024
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Means of redress
OPPO
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Complaint
OPPO
Jun 25, 2024
Complaint
OPPO
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Claims
OPPO
Jun 24, 2024
Claims
OPPO
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Jul 5, 2022
May 27, 2022
Decision to grant a European patent
Search/Exam
May 13, 2022
(Electronic) Receipt
Search/Exam
May 13, 2022
Filing of the translations of the claims
Search/Exam
May 13, 2022
French translation of claims
Search/Exam
May 13, 2022
German translation of the claims
Search/Exam
May 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Apr 5, 2022
Apr 5, 2022
Apr 5, 2022
Intention to grant (signatures)
Search/Exam
Apr 5, 2022
Text intended for grant (clean copy)
Search/Exam
Apr 5, 2022
Text intended for grant (sequence listing)
Search/Exam
Apr 5, 2022
Mar 11, 2022
Examination started
Search/Exam
Jan 18, 2022
(Electronic) Receipt
Search/Exam
Jan 18, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 13, 2022
(Electronic) Receipt
Search/Exam
Jan 13, 2022
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Amended description with annotations
Search/Exam
Jan 13, 2022
Amendments received before examination
Search/Exam
Jan 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Oct 25, 2021
Oct 12, 2021
Refund of fees
Search/Exam
Sep 22, 2021
Sep 22, 2021
European search opinion
Search/Exam
Sep 22, 2021
European search report
Search/Exam
Sep 22, 2021
Information on Search Strategy
Search/Exam
Sep 22, 2021
Notification of forthcoming publication
Search/Exam
May 10, 2021
(Electronic) Receipt
Search/Exam
May 10, 2021
Claims
Search/Exam
May 10, 2021
Letter accompanying subsequently filed items
Search/Exam
May 10, 2021
Matter concerning the application
Search/Exam
Apr 20, 2021
Apr 8, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 8, 2021
Mar 12, 2021
Invitation to file claims
Search/Exam
Mar 2, 2021
Abstract
Search/Exam
Mar 2, 2021
Mar 2, 2021
Converted Sequence Listing
Search/Exam
Mar 2, 2021
Description
Search/Exam
Mar 2, 2021
Designation of inventor
Search/Exam
Mar 2, 2021
Drawings
Search/Exam
Mar 2, 2021
Matter concerning the application
Search/Exam
Mar 2, 2021
Request for grant of a European patent
Search/Exam
Mar 2, 2021
Submission concerning representation
Search/Exam
Jul 5, 2018