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The patent EP3427290 was granted to Oxford University Innovation on Aug 4, 2021. The application was filed on Mar 8, 2017 under application number EP17711270A. 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 |
|---|---|---|---|
| GRUND IPG PATENTANWALTE UND SOLICITOR PARTG MBB | May 4, 2022 | GRUND | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2014056903 |
| INTERNATIONAL-SEARCH-REPORT | WO2013126385 |
| INTERNATIONAL-SEARCH-REPORT | WO2016020699 |
| OPPOSITION | CN105331362 |
| OPPOSITION | JP2014056903 |
| OPPOSITION | WO2013126385 |
| OPPOSITION | WO2016020699 |
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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Nov 14, 2025
Nov 14, 2025
Nov 11, 2025
Oct 28, 2025
Sep 30, 2024
Sep 27, 2024
(Electronic) Receipt
Appeal
Sep 27, 2024
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Sep 4, 2024
Aug 30, 2024
(Electronic) Receipt
Appeal
Aug 30, 2024
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(Electronic) Receipt
Appeal
Jul 8, 2024
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Jun 28, 2024
(Electronic) Receipt
Appeal
Jun 28, 2024
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Jun 7, 2024
(Electronic) Receipt
Appeal
Jun 7, 2024
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Reply to appeal
Appeal
Mar 12, 2024
Mar 6, 2024
(Electronic) Receipt
Appeal
Mar 6, 2024
Mar 6, 2024
Mar 6, 2024
Mar 6, 2024
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Jan 10, 2024
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Jan 4, 2024
(Electronic) Receipt
Appeal
Jan 4, 2024
Jan 4, 2024
Notice of appeal
Appeal
Nov 9, 2023
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Means of redress
OPPO
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Sep 20, 2021
Aug 17, 2021
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Decision to grant a European patent
Search/Exam
Jun 24, 2021
(Electronic) Receipt
Search/Exam
Jun 24, 2021
Filing of the translations of the claims
Search/Exam
Jun 24, 2021
French translation of claims
Search/Exam
Jun 24, 2021
German translation of the claims
Search/Exam
Jun 24, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 4, 2021
Mar 4, 2021
Mar 4, 2021
Intention to grant (signatures)
Search/Exam
Mar 4, 2021
Text intended for grant (clean copy)
Search/Exam
Mar 4, 2021
Feb 8, 2021
Examination started
Search/Exam
Apr 17, 2019
(Electronic) Receipt
Search/Exam
Apr 17, 2019
Apr 17, 2019
Amended claims with annotations
Search/Exam
Apr 17, 2019
Apr 17, 2019
Amended description with annotations
Search/Exam
Apr 17, 2019
Amendments received before examination
Search/Exam
Apr 17, 2019
Letter accompanying subsequently filed items
Search/Exam
Dec 19, 2018
Oct 17, 2018
Oct 15, 2018
Communication to designated inventor
Search/Exam
Oct 15, 2018
Communication to designated inventor
Search/Exam
Oct 15, 2018
Communication to designated inventor
Search/Exam
Oct 15, 2018
Communication to designated inventor
Search/Exam
Oct 15, 2018
Communication to designated inventor
Search/Exam
Oct 15, 2018
Communication to designated inventor
Search/Exam
Oct 1, 2018
(Electronic) Receipt
Search/Exam
Oct 1, 2018
Matter concerning the application
Search/Exam
Oct 1, 2018
Request for entry into the European phase
Search/Exam
Sep 26, 2018
Jul 18, 2018
Information on entry into European phase
Search/Exam
Oct 2, 2017
Sep 14, 2017
Copy of the international search report
Search/Exam
Sep 14, 2017
Published international application - A1
Search/Exam
May 16, 2017
ISR: cited documents
PCTISA
May 15, 2017
May 15, 2017
May 15, 2017
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May 15, 2017
Mar 30, 2017
Mar 17, 2017
Abstract
PCTISA
Mar 17, 2017
Claims
PCTISA
Mar 17, 2017
Description
PCTISA
Mar 17, 2017
Drawings
PCTISA
Mar 17, 2017
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