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The patent EP3785536 was granted to Trianni on Sep 17, 2025. The application was filed on Aug 28, 2019 under application number EP19194093A. 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 |
|---|---|---|---|
| REGENERON PHARMACEUTICALS | Oct 25, 2022 | GRUND | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2013219535 |
| DESCRIPTION | US5591669 |
| DESCRIPTION | US5593598 |
| DESCRIPTION | US5612205 |
| DESCRIPTION | US5661016 |
| DESCRIPTION | US5789650 |
| DESCRIPTION | US5814318 |
| DESCRIPTION | US5874299 |
| DESCRIPTION | US5877397 |
| DESCRIPTION | US6023010 |
| DESCRIPTION | US6091001 |
| DESCRIPTION | US6130364 |
| DESCRIPTION | US6162963 |
| DESCRIPTION | US6570061 |
| DESCRIPTION | US6596541 |
| DESCRIPTION | US6673986 |
| DESCRIPTION | US7041871 |
| DESCRIPTION | US7064244 |
| DESCRIPTION | US7145056 |
| DESCRIPTION | US8502018 |
| DESCRIPTION | US8697940 |
| DESCRIPTION | WO2017035252 |
| OPPOSITION | EP4067496 |
| OPPOSITION | US2017303517 |
| OPPOSITION | US2017306352 |
| OPPOSITION | WO2012018610 |
| OPPOSITION | WO2012141798 |
| SEARCH | WO2012141798 |
| SEARCH | WO2013079953 |
| SEARCH | WO2017201476 |
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.
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Description
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Decision to grant a European patent
Search/Exam
Dec 23, 2021
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(Electronic) Receipt
Search/Exam
Dec 20, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 20, 2021
Nov 11, 2021
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Oct 15, 2021
(Electronic) Receipt
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Oct 15, 2021
Letter accompanying subsequently filed items
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Sep 3, 2021
Extension of time limit granted
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Aug 25, 2021
(Electronic) Receipt
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Aug 25, 2021
Letter accompanying subsequently filed items
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(Electronic) Receipt
Search/Exam
Jun 16, 2021
Letter accompanying subsequently filed items
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Jun 16, 2021
Matter concerning the application
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Jun 15, 2021
Jun 8, 2021
(Electronic) Receipt
Search/Exam
Jun 8, 2021
Filing of the translations of the claims
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Jun 8, 2021
French translation of claims
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Jun 8, 2021
German translation of the claims
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Jun 8, 2021
Letter accompanying subsequently filed items
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Apr 19, 2021
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Intention to grant (signatures)
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Apr 19, 2021
Text intended for grant (clean copy)
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Apr 19, 2021
Text intended for grant (sequence listing)
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Apr 19, 2021
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(Electronic) Receipt
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Mar 31, 2021
Letter accompanying subsequently filed items
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Mar 31, 2021
Observations by third parties
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Mar 9, 2021
Feb 3, 2021
Notification of forthcoming publication
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Apr 17, 2020
(Electronic) Receipt
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Apr 17, 2020
Amended claims with annotations
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Apr 17, 2020
Amended description with annotations
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Apr 17, 2020
Claims
Search/Exam
Apr 17, 2020
Description
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Apr 17, 2020
Letter accompanying subsequently filed items
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Apr 17, 2020
Apr 7, 2020
Annex to the communication
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Apr 7, 2020
Communication from the Examining Division
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Apr 1, 2020
Examination started
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Jan 10, 2020
(Electronic) Receipt
Search/Exam
Jan 10, 2020
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Amended claims with annotations
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Jan 10, 2020
Amendments received before examination
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Jan 10, 2020
Letter accompanying subsequently filed items
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Dec 5, 2019
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European search opinion
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Dec 5, 2019
European search report
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Dec 5, 2019
Information on Search Strategy
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Nov 21, 2019
Search started
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Oct 21, 2019
Communication to designated inventor
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Oct 21, 2019
Communication to designated inventor
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Oct 21, 2019
Communication to designated inventor
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Aug 28, 2019
Abstract
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Aug 28, 2019
Aug 28, 2019
Claims
Search/Exam
Aug 28, 2019
Converted Sequence Listing
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Aug 28, 2019
Description
Search/Exam
Aug 28, 2019
Designation of inventor
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Aug 28, 2019
Drawings
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Aug 28, 2019
Request for grant of a European patent
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