Method For The Production Of Aav

Patent No. EP4107252 (titled "Method For The Production Of Aav") was filed by Cevec Pharmaceuticals on Nov 23, 2021. The application was issued on Feb 19, 2025.

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
SARTORIUS XELL	Nov 18, 2025	COHAUSZ & FLORACK

Dossier Documents

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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Mar 6, 2026
Decision revoking the European patent
Mar 6, 2026
Decision revoking the European patent
Mar 2, 2026
(Electronic) Receipt
Mar 2, 2026
Letter accompanying subsequently filed items
Mar 2, 2026
Request for revocation of patent
Dec 12, 2025
Brief communication - Opposition proceedings
Dec 12, 2025
Communication of amended entries concerning the representative
Dec 10, 2025
Communication concerning the filing of a power of attorney
Dec 8, 2025
(Electronic) Receipt
Dec 8, 2025
Authorisation
Dec 8, 2025
Submission concerning change of proprietor's representative
Dec 1, 2025
Communication of a notice of opposition and request to file observations
Dec 1, 2025
Notice of further oppositions to opponent(s)
Nov 24, 2025
Communication of a notice of opposition - first information to patent proprietor
Nov 18, 2025
(Electronic) Receipt
Nov 18, 2025
Any annexes (other than citation) to an opposition letter
Nov 18, 2025
Citation in opposition procedure - 001
Nov 18, 2025
Citation in opposition procedure - 002
Nov 18, 2025
Citation in opposition procedure - 003
Nov 18, 2025
Citation in opposition procedure - 004
Nov 18, 2025
Citation in opposition procedure - 005
Nov 18, 2025
Citation in opposition procedure - 006
Nov 18, 2025
Citation in opposition procedure - 007
Nov 18, 2025
Citation in opposition procedure - 008
Nov 18, 2025
Citation in opposition procedure - 009
Nov 18, 2025
Citation in opposition procedure - 010
Nov 18, 2025
Citation in opposition procedure - 011
Nov 18, 2025
Citation in opposition procedure - 012
Nov 18, 2025
Citation in opposition procedure - 013
Nov 18, 2025
Citation in opposition procedure - 014
Nov 18, 2025
Citation in opposition procedure - 015
Nov 18, 2025
Consolidated list of cited opposition documents
Nov 18, 2025
Notice of opposition
Nov 18, 2025
Notice of opposition
Sep 4, 2025
Communication of the registration of a transfer or change of name and/or address
Aug 21, 2025
(Electronic) Receipt
Aug 21, 2025
Annexes in respect of a client data request
Aug 21, 2025
Annexes in respect of a client data request
Aug 21, 2025
Letter accompanying subsequently filed items
Aug 21, 2025
Submission concerning change of applicant's address
Mar 4, 2025
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jan 23, 2025
Decision to grant a European patent
Jan 13, 2025
(Electronic) Receipt
Jan 13, 2025
French translation of claims
Jan 13, 2025
German translation of the claims
Jan 13, 2025
Letter accompanying subsequently filed items
Nov 6, 2024
Annex to the communication about intention to grant a European patent
Nov 6, 2024
Bibliographic data of the European patent application
Nov 6, 2024
Communication about intention to grant a European patent
Nov 6, 2024
Intention to grant (signatures)
Nov 6, 2024
Text intended for grant (clean copy)
Nov 6, 2024
Text intended for grant (version for approval)
Apr 29, 2024
(Electronic) Receipt
Apr 29, 2024
Amended claims with annotations
Apr 29, 2024
Amended description with annotations
Apr 29, 2024
Claims
Apr 29, 2024
Description
Apr 29, 2024
Letter accompanying subsequently filed items
Apr 29, 2024
Reply to communication from the Examining Division
Mar 5, 2024
Grant of extension of time limit (examination procedure)
Feb 28, 2024
(Electronic) Receipt
Feb 28, 2024
Request for extension of time limit to communication from the Examining Division
Oct 19, 2023
Annex to the communication
Oct 19, 2023
Communication from the Examining Division
Sep 15, 2023
Communication concerning the filing of a power of attorney
Sep 15, 2023
Communication of amended entries concerning the representative
Sep 6, 2023
Annexes in respect of a client data request
Sep 6, 2023
General authorisation
Sep 6, 2023
General authorisation
Sep 6, 2023
Letter accompanying subsequently filed items
Sep 6, 2023
Submission concerning change of applicant's representative
Aug 3, 2023
(Electronic) Receipt
Aug 3, 2023
Amended claims with annotations
Aug 3, 2023
Claims
Aug 3, 2023
Letter accompanying subsequently filed items
Aug 3, 2023
Reply to communication from the Examining Division
May 30, 2023
Annexes to the international preliminary examination report
May 30, 2023
Copy of the international preliminary examination report
Apr 13, 2023
Annex to the communication
Apr 13, 2023
Communication from the Examining Division
Dec 1, 2022
Examination started
Nov 30, 2022
Notification on forthcoming publication of bibliographic data
Nov 4, 2022
(Electronic) Receipt
Nov 4, 2022
Letter accompanying subsequently filed items
Nov 4, 2022
Matter concerning the application
Oct 18, 2022
Communication regarding comments on written opinion/amendment of application/payment of claims fee
Oct 11, 2022
Priority search results copy provided by EPO
Oct 6, 2022
(Electronic) Receipt
Oct 6, 2022
Letter accompanying subsequently filed items
Oct 6, 2022
Matter concerning the application
Sep 29, 2022
Communication for party to proceedings/third party
Sep 29, 2022
Confirmation of effective date of early entry
Sep 21, 2022
(Electronic) Receipt
Sep 21, 2022
Converted Sequence Listing
Sep 21, 2022
Request for entry into the European phase
Aug 22, 2022
Annex to International preliminary examination report
Aug 22, 2022
Annexes to the international preliminary examination report
Aug 22, 2022
Copy of the international preliminary examination report
Aug 22, 2022
International preliminary examination report
Aug 22, 2022
International preliminary examination report - free text sheet
Aug 22, 2022
International preliminary examination report - points I-VIII
Aug 22, 2022
Transmittal of International Preliminary Examination Report
Jul 21, 2022
Notification of election of EPO
Jul 13, 2022
Notification of receipt of demand
Jul 6, 2022
PCT demand form
Jul 6, 2022
PCT(IPEA): Amended sheet - claims
Jul 6, 2022
PCT(IPEA): Amended sheet - claims
Jul 6, 2022
Payment of fees and costs
Jul 6, 2022
Reply to International Search Opinion
Jun 20, 2022
Priority document (electronically transmitted)
Jun 2, 2022
Copy of the international search report
Jun 2, 2022
Published international application - A1
Jun 2, 2022
Sequence listing
Dec 7, 2021
Notification of the international application number and of the international filing date
Nov 23, 2021
(Electronic) Receipt
Nov 23, 2021
Abstract
Nov 23, 2021
Claims
Nov 23, 2021
Converted Sequence Listing
Nov 23, 2021
Description
Nov 23, 2021
Document concerning fees and payments
Nov 23, 2021
Drawings
Nov 23, 2021
Electronic request for grant of an International application
Nov 23, 2021
Incoming letter related to PCT RO
Nov 23, 2021
Priority document (RO-procedure)
Nov 23, 2021
Sequence listing

EP4107252

CEVEC PHARMACEUTICALS

Application Number: EP21811385A
Filing Date: Nov 23, 2021
Status: Granted And Under Opposition; Jan 17, 2025
Publication Date: Feb 19, 2025
External Links: Slate, Register , Google Patents

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Method For The Production Of Aav

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Dossier Documents

EP4107252