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The patent EP3806891 was granted to Laboratoire Franais DU Fractionnement ET DES Biotechnologies on Aug 2, 2023. The application was filed on Jun 14, 2019 under application number EP19742443A. 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 |
|---|---|---|---|
| STRAWMAN | Apr 30, 2024 | VOSSIUS & PARTNER | ADMISSIBLE |
| STRAWMAN | Apr 30, 2024 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP20120305882 |
| DESCRIPTION | EP0200421 |
| DESCRIPTION | EP0527063 |
| DESCRIPTION | EP1688488 |
| DESCRIPTION | US4784950 |
| DESCRIPTION | US5997864 |
| DESCRIPTION | US6268487 |
| DESCRIPTION | US7695936 |
| DESCRIPTION | WO2005035756 |
| DESCRIPTION | WO2006109592 |
| DESCRIPTION | WO2010149907 |
| DESCRIPTION | WO2012067176 |
| DESCRIPTION | WO2017188356 |
| DESCRIPTION | WO2018047813 |
| INTERNATIONAL-SEARCH-REPORT | EP2687595 |
| OPPOSITION | EP2687595 |
| OPPOSITION | EP3690050 |
| OPPOSITION | JP2017189647 |
| OPPOSITION | US2009311239 |
| OPPOSITION | US2011059510 |
| OPPOSITION | WO2019065795 |
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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OPPO
Apr 30, 2025
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OPPO
Apr 30, 2025
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OPPO
Apr 30, 2025
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OPPO
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Aug 16, 2023
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Decision to grant a European patent
Search/Exam
Jun 2, 2023
(Electronic) Receipt
Search/Exam
Jun 2, 2023
English translation of the claims
Search/Exam
Jun 2, 2023
Filing of the translations of the claims
Search/Exam
Jun 2, 2023
German translation of the claims
Search/Exam
Jun 2, 2023
Letter accompanying subsequently filed items
Search/Exam
Feb 7, 2023
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Intention to grant (signatures)
Search/Exam
Feb 7, 2023
Text intended for grant (clean copy)
Search/Exam
Feb 7, 2023
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Annexes in respect of a client data request
Search/Exam
Aug 4, 2022
Annexes in respect of a client data request
Search/Exam
Aug 4, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 21, 2022
Annexes in respect of a client data request
Search/Exam
Jul 21, 2022
Annexes in respect of a client data request
Search/Exam
Jul 21, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 21, 2022
May 19, 2022
(Electronic) Receipt
Search/Exam
May 19, 2022
Amended claims with annotations
Search/Exam
May 19, 2022
Claims
Search/Exam
May 19, 2022
Letter accompanying subsequently filed items
Search/Exam
May 19, 2022
Jan 13, 2022
Annex to the communication
Search/Exam
Jan 13, 2022
Communication from the Examining Division
Search/Exam
Jan 7, 2022
Examination started
Search/Exam
Mar 24, 2021
Feb 25, 2021
Feb 11, 2021
Letter which had not been notified
Search/Exam
Jan 27, 2021
Jan 20, 2021
Priority search results copy provided by EPO
Search/Exam
Jan 19, 2021
Communication to designated inventor
Search/Exam
Jan 11, 2021
Jan 5, 2021
Jan 4, 2021
(Electronic) Receipt
Search/Exam
Jan 4, 2021
Request for entry into the European phase
Search/Exam
Oct 23, 2020
Information on entry into European phase
Search/Exam
Jan 8, 2020
Dec 19, 2019
Copy of the international search report
Search/Exam
Dec 19, 2019
Copy of the international search report
Search/Exam
Dec 19, 2019
Published international application - A1
Search/Exam
Oct 10, 2019
ISR: cited documents
PCTISA
Oct 10, 2019
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Aug 5, 2019
Jul 25, 2019
Abstract
PCTISA
Jul 25, 2019
Claims
PCTISA
Jul 25, 2019
Description
PCTISA
Jul 25, 2019
Drawings
PCTISA
Jul 25, 2019