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The patent EP3263581 was granted to University OF Connecticut on Jul 9, 2025. The application was originally filed on May 17, 2006 under application number EP17182599A. 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 |
|---|---|---|---|
| MARGARET DIXON | Aug 4, 2021 | MEWBURN ELLIS | ADMISSIBLE |
| CYTUNE PHARMA | Aug 4, 2021 | MAIWALD | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0003089 |
| DESCRIPTION | EP0264166 |
| DESCRIPTION | US3773919 |
| DESCRIPTION | US4485045 |
| DESCRIPTION | US4522811 |
| DESCRIPTION | US4544545 |
| DESCRIPTION | US4676980 |
| DESCRIPTION | US4683202 |
| DESCRIPTION | US4873316 |
| DESCRIPTION | US4946778 |
| DESCRIPTION | US5013556 |
| DESCRIPTION | US5223409 |
| DESCRIPTION | US5328470 |
| DESCRIPTION | US5545806 |
| DESCRIPTION | US5545807 |
| DESCRIPTION | US5569825 |
| DESCRIPTION | US5625126 |
| DESCRIPTION | US5633425 |
| DESCRIPTION | US5661016 |
| DESCRIPTION | WO9002809 |
| DESCRIPTION | WO9100360 |
| DESCRIPTION | WO9100906 |
| DESCRIPTION | WO9110741 |
| DESCRIPTION | WO9117271 |
| DESCRIPTION | WO9201047 |
| DESCRIPTION | WO9203917 |
| DESCRIPTION | WO9203918 |
| DESCRIPTION | WO9206204 |
| DESCRIPTION | WO9209690 |
| DESCRIPTION | WO9215679 |
| DESCRIPTION | WO9218619 |
| DESCRIPTION | WO9220373 |
| DESCRIPTION | WO9220791 |
| DESCRIPTION | WO9301288 |
| DESCRIPTION | WO9308829 |
| DESCRIPTION | WO9402602 |
| DESCRIPTION | WO9411026 |
| DESCRIPTION | WO9627011 |
| DESCRIPTION | WO9633735 |
| DESCRIPTION | WO9634096 |
| OPPOSITION | US2004170604 |
| OPPOSITION | US2019263877 |
| OPPOSITION | US6013480 |
| OPPOSITION | WO2005085282 |
| OPPOSITION | WO2006063974 |
| OTHER | EP1899364 |
| SEARCH | US2004170604 |
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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Jun 13, 2025
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OPPO
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Letter accompanying subsequently filed items
Search/Exam
Dec 19, 2022
Nov 3, 2022
Communication of amended entries
Search/Exam
Oct 13, 2022
Request concerning representative opponent
Search/Exam
Oct 6, 2022
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Drawings
OPPO
Feb 28, 2022
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Nov 16, 2020
Oct 8, 2020
Decision to grant a European patent
Search/Exam
Sep 21, 2020
(Electronic) Receipt
Search/Exam
Sep 21, 2020
Filing of the translations of the claims
Search/Exam
Sep 21, 2020
French translation of claims
Search/Exam
Sep 21, 2020
German translation of the claims
Search/Exam
May 28, 2020
May 28, 2020
May 28, 2020
Intention to grant (signatures)
Search/Exam
May 28, 2020
Text intended for grant (clean copy)
Search/Exam
May 28, 2020
Text intended for grant (sequence listing)
Search/Exam
May 28, 2020
Feb 3, 2020
(Electronic) Receipt
Search/Exam
Feb 3, 2020
Amended claims with annotations
Search/Exam
Feb 3, 2020
Amended description with annotations
Search/Exam
Feb 3, 2020
Claims
Search/Exam
Feb 3, 2020
Description
Search/Exam
Feb 3, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 3, 2020
Oct 4, 2019
Annex to the communication
Search/Exam
Oct 4, 2019
Communication from the Examining Division
Search/Exam
May 3, 2019
May 3, 2019
Apr 29, 2019
(Electronic) Receipt
Search/Exam
Apr 29, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 29, 2019
Observations by third parties
Search/Exam
Mar 19, 2019
(Electronic) Receipt
Search/Exam
Mar 19, 2019
Amended claims with annotations
Search/Exam
Mar 19, 2019
Amended description with annotations
Search/Exam
Mar 19, 2019
Claims
Search/Exam
Mar 19, 2019
Description
Search/Exam
Mar 19, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 19, 2019
Jan 3, 2019
Jan 3, 2019
Dec 20, 2018
(Electronic) Receipt
Search/Exam
Dec 20, 2018
Letter accompanying subsequently filed items
Search/Exam
Dec 20, 2018
Observations by third parties
Search/Exam
Nov 20, 2018
Annex to the communication
Search/Exam
Nov 20, 2018
Communication from the Examining Division
Search/Exam
Sep 3, 2018
Examination started
Search/Exam
Jun 28, 2018
(Electronic) Receipt
Search/Exam
Jun 28, 2018
Jun 28, 2018
Amended claims with annotations
Search/Exam
Jun 28, 2018
Amendments received before examination
Search/Exam
Jun 28, 2018
Letter accompanying subsequently filed items
Search/Exam
Jun 28, 2018
Jun 28, 2018
Jan 8, 2018
Dec 6, 2017
Notification of forthcoming publication
Search/Exam
Dec 5, 2017
Nov 23, 2017
Letter which had not been notified
Search/Exam
Oct 13, 2017
Communication to designated inventor
Search/Exam
Oct 13, 2017
Communication to designated inventor
Search/Exam
Oct 11, 2017
Refund of fees
Search/Exam
Oct 5, 2017
Oct 5, 2017
European search opinion
Search/Exam
Oct 5, 2017
European search report
Search/Exam
Oct 5, 2017
Information on Search Strategy
Search/Exam
Aug 30, 2017
Refund of fees
Search/Exam
Aug 29, 2017
Jul 21, 2017
Abstract
Search/Exam
Jul 21, 2017
Jul 21, 2017
Claims
Search/Exam
Jul 21, 2017
Converted Sequence Listing
Search/Exam
Jul 21, 2017
Description
Search/Exam
Jul 21, 2017
Designation of inventor
Search/Exam
Jul 21, 2017
Drawings
Search/Exam
Jul 21, 2017
General authorisation
Search/Exam
Jul 21, 2017
Request for grant of a European patent
Search/Exam
Jan 24, 2007