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The patent EP3122426 was granted to Duke University on Jan 18, 2023. The application was filed on Mar 28, 2015 under application number EP15769394A. 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 |
|---|---|---|---|
| SANDOZ | Oct 18, 2023 | ELKINGTON AND FIFE | ADMISSIBLE |
| TEVA PHARMACEUTICALS | Oct 4, 2023 | VON KAUFFMANN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US5681835 |
| INTERNATIONAL-SEARCH-REPORT | US2006116364 |
| OPPOSITION | US2006116364 |
| OPPOSITION | WO2008002490 |
| OPPOSITION | WO2009137104 |
| OPPOSITION | WO2015149045 |
| SEARCH | WO2009137104 |
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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Jan 5, 2026
Jan 5, 2026
Dec 20, 2025
(Electronic) Receipt
Appeal
Dec 20, 2025
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Reply to appeal
Appeal
Aug 21, 2025
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Aug 14, 2025
(Electronic) Receipt
Appeal
Aug 14, 2025
Aug 14, 2025
Aug 13, 2025
(Electronic) Receipt
Appeal
Aug 13, 2025
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(Electronic) Receipt
Appeal
May 29, 2025
Notice of appeal
Appeal
May 29, 2025
Notice of appeal
Appeal
May 26, 2025
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(Electronic) Receipt
Appeal
May 25, 2025
May 25, 2025
Notice of appeal
Appeal
May 16, 2025
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Means of redress
OPPO
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Jan 31, 2023
Dec 22, 2022
Decision to grant a European patent
Search/Exam
Dec 13, 2022
(Electronic) Receipt
Search/Exam
Dec 13, 2022
French translation of claims
Search/Exam
Dec 13, 2022
German translation of the claims
Search/Exam
Dec 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Aug 5, 2022
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Intention to grant (signatures)
Search/Exam
Aug 5, 2022
Text intended for grant (clean copy)
Search/Exam
Aug 5, 2022
Jul 28, 2022
Jul 8, 2022
(Electronic) Receipt
Search/Exam
Jul 8, 2022
Description
Search/Exam
Jul 8, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 8, 2022
Jun 28, 2022
Oct 8, 2021
(Electronic) Receipt
Search/Exam
Oct 8, 2021
Description
Search/Exam
Oct 8, 2021
Description
Search/Exam
Oct 8, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 8, 2021
May 31, 2021
Annex to the communication
Search/Exam
May 31, 2021
Communication from the Examining Division
Search/Exam
Oct 12, 2020
Decision to allow further processing
Search/Exam
Sep 1, 2020
(Electronic) Receipt
Search/Exam
Sep 1, 2020
Amended claims with annotations
Search/Exam
Sep 1, 2020
Claims
Search/Exam
Sep 1, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 1, 2020
Request for further processing
Search/Exam
Jul 1, 2020
Apr 9, 2020
Apr 3, 2020
(Electronic) Receipt
Search/Exam
Apr 3, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 3, 2020
Nov 29, 2019
Annex to the communication
Search/Exam
Nov 29, 2019
Communication from the Examining Division
Search/Exam
Nov 14, 2019
Examination started
Search/Exam
Jun 14, 2019
Jun 1, 2018
Jun 1, 2018
Amendments received before examination
Search/Exam
Nov 21, 2017
Nov 2, 2017
Nov 2, 2017
European search opinion
Search/Exam
Nov 2, 2017
Information on Search Strategy
Search/Exam
Nov 2, 2017
Supplementary European search report
Search/Exam
Oct 17, 2017
Search started
Search/Exam
May 22, 2017
May 22, 2017
Amendments received before examination
Search/Exam
Jan 4, 2017
Nov 11, 2016
Nov 9, 2016
Communication to designated inventor
Search/Exam
Nov 9, 2016
Communication to designated inventor
Search/Exam
Nov 9, 2016
Communication to designated inventor
Search/Exam
Oct 27, 2016
(Electronic) Receipt
Search/Exam
Oct 27, 2016
Request for entry into the European phase
Search/Exam
Oct 17, 2016
Aug 5, 2016
Information on entry into European phase
Search/Exam
Oct 20, 2015
Oct 20, 2015
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Oct 1, 2015
Copy of the international search report
Search/Exam
Oct 1, 2015
Published international application - A1
Search/Exam