Tumor Therapeutic Agent

Patent No. EP3338779 (titled "Tumor Therapeutic Agent") was filed by Eisai R&D Management on Aug 18, 2016. The application was issued on Jun 30, 2021.

Patent Family

Statuses, jurisdictions and citation links are shared on request.

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
STADA ARZNEIMITTEL	Mar 29, 2022	HAMM&WITTKOPP PATENTANWÄLTE PARTMBB

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

Aug 25, 2025
Decision of the Board of Appeal
Aug 25, 2025
F3032 Notification(s) of the decision
Aug 25, 2025
F3032 Notification(s) of the decision
Jul 16, 2025
F3013 Oral Proceedings: Forwarding minutes
Jul 16, 2025
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Jun 10, 2025
F3345 Forwarding of submissions to parties
Jun 6, 2025
(Electronic) Receipt
Jun 6, 2025
Letter accompanying subsequently filed items
Jun 6, 2025
Request for interpreters during oral proceedings
May 8, 2025
F3345 Forwarding of submissions to parties
May 7, 2025
F3345 Forwarding of submissions to parties
May 2, 2025
(Electronic) Receipt
May 2, 2025
Citation in appeal procedure - 021
May 2, 2025
Letter accompanying subsequently filed items
May 2, 2025
Letter dealing with oral proceedings during the appeal procedure
Apr 30, 2025
(Electronic) Receipt
Apr 30, 2025
Letter accompanying subsequently filed items
Apr 30, 2025
Request for interpreters during oral proceedings
Apr 8, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Apr 8, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Feb 28, 2025
F3345 Forwarding of submissions to parties
Feb 26, 2025
(Electronic) Receipt
Feb 26, 2025
Cited document during appeal procedure
Feb 26, 2025
Cited document during appeal procedure
Feb 26, 2025
Letter accompanying subsequently filed items
Feb 26, 2025
Letter relating to Appeal Procedure
Oct 4, 2024
F3022 Oral proceedings: change of board composition
Sep 30, 2024
F3303.17 Change of the composition of the Board (T), in case Chairman is a legal member
Jul 19, 2024
F3011.1 Oral Proceedings: summons
Jul 19, 2024
F3011.1 Oral Proceedings: summons
Jul 16, 2024
F3010 Oral proceedings: order for summons
Jul 3, 2024
Composition of the board (T)
Jun 4, 2024
F3345 Forwarding of submissions to parties
May 29, 2024
(Electronic) Receipt
May 29, 2024
Letter accompanying subsequently filed items
May 29, 2024
Reply to appeal
Feb 1, 2024
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Jan 29, 2024
(Electronic) Receipt
Jan 29, 2024
Letter accompanying subsequently filed items
Jan 29, 2024
Statement of grounds of appeal
Dec 7, 2023
F3345 Forwarding of submissions to parties
Dec 5, 2023
(Electronic) Receipt
Dec 5, 2023
Letter accompanying subsequently filed items
Dec 5, 2023
Letter relating to Appeal Procedure
Dec 1, 2023
F3204 Communication of the file number to the parties
Dec 1, 2023
F3204 Communication of the file number to the parties
Nov 29, 2023
(Electronic) Receipt
Nov 29, 2023
Letter accompanying subsequently filed items
Nov 29, 2023
Notice of appeal
Oct 2, 2023
Advice of delivery
Oct 2, 2023
Advice of delivery
Sep 29, 2023
Annex to the communication - opposition
Sep 29, 2023
Decision of the Opposition Division and instruction
Sep 29, 2023
Druckexemplar in opposition procedure
Sep 29, 2023
Grounds for the decision (Annex) - opposition
Sep 29, 2023
Interlocutory decision in opposition proceedings
Sep 29, 2023
Interlocutory decision in opposition proceedings
Sep 29, 2023
Means of redress
Sep 29, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Sep 29, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Sep 29, 2023
Provision of a copy of the minutes - opposition procedure
Sep 29, 2023
Provision of a copy of the minutes - opposition procedure
Sep 29, 2023
Scanned annex to a communication - opposition procedure
Sep 29, 2023
Scanned annex to a communication - opposition procedure
Sep 29, 2023
Scanned annex to a communication - opposition procedure
Sep 29, 2023
Transmittal of decision / summons - opposition
Sep 29, 2023
Transmittal of decision / summons - opposition
Sep 7, 2023
Information about the result of oral proceedings
Jul 21, 2023
Annex to the communication - opposition
Jul 21, 2023
Brief communication - Opposition proceedings
Jul 21, 2023
Brief communication - Opposition proceedings
Jul 12, 2023
Brief communication - Opposition proceedings
Jul 10, 2023
Brief communication - Opposition proceedings
Jul 7, 2023
(Electronic) Receipt
Jul 7, 2023
Brief communication - Opposition proceedings
Jul 7, 2023
Citation in opposition procedure - 016
Jul 7, 2023
Citation in opposition procedure - 017
Jul 7, 2023
Citation in opposition procedure - 018
Jul 7, 2023
Consolidated list of cited opposition documents
Jul 7, 2023
Letter accompanying subsequently filed items
Jul 7, 2023
Written submission in preparation to/during oral proceedings
Jul 5, 2023
(Electronic) Receipt
Jul 5, 2023
Citation in opposition procedure - 014
Jul 5, 2023
Citation in opposition procedure - 015
Jul 5, 2023
Letter accompanying subsequently filed items
Jul 5, 2023
Written submission in preparation to/during oral proceedings
Jul 4, 2023
(Electronic) Receipt
Jul 4, 2023
Letter accompanying subsequently filed items
Jul 4, 2023
Request for interpreters during oral proceedings
Feb 20, 2023
Brief communication - Opposition proceedings
Feb 14, 2023
(Electronic) Receipt
Feb 14, 2023
(Electronic) Receipt
Feb 14, 2023
Letter accompanying subsequently filed items
Feb 14, 2023
Request for interpreters during oral proceedings
Feb 1, 2023
Advice of delivery
Jan 31, 2023
Advice of delivery
Jan 30, 2023
Information concerning oral proceedings
Jan 30, 2023
Summons to attend oral proceedings
Jan 30, 2023
Summons to attend oral proceedings
Jan 30, 2023
Transmittal of decision / summons - opposition
Jan 30, 2023
Transmittal of decision / summons - opposition
Jan 27, 2023
Notification concerning the date of oral proceedings
Jan 27, 2023
Notification concerning the date of oral proceedings
Jan 26, 2023
Brief communication - Opposition proceedings
Jan 20, 2023
(Electronic) Receipt
Jan 20, 2023
Advice of delivery
Jan 20, 2023
Advice of delivery
Jan 20, 2023
Letter accompanying subsequently filed items
Jan 20, 2023
Oral proceedings: Request for postponement
Jan 19, 2023
Annex to the communication - opposition
Jan 19, 2023
Information concerning oral proceedings
Jan 19, 2023
Scanned annex to a communication - opposition procedure
Jan 19, 2023
Summons to attend oral proceedings
Jan 19, 2023
Summons to attend oral proceedings
Jan 19, 2023
Transmittal of decision / summons - opposition
Jan 19, 2023
Transmittal of decision / summons - opposition
Aug 25, 2022
Brief communication - Opposition proceedings
Aug 19, 2022
(Electronic) Receipt
Aug 19, 2022
Citation in opposition procedure - 008
Aug 19, 2022
Citation in opposition procedure - 009
Aug 19, 2022
Citation in opposition procedure - 010
Aug 19, 2022
Citation in opposition procedure - 011
Aug 19, 2022
Citation in opposition procedure - 012
Aug 19, 2022
Citation in opposition procedure - 013
Aug 19, 2022
Letter accompanying subsequently filed items
Aug 19, 2022
Main request during Opposition procedure
Aug 19, 2022
Main request during Opposition procedure
Aug 19, 2022
Reply of the patent proprietor to the notice(s) of opposition
Apr 12, 2022
Brief communication - Opposition proceedings
Apr 11, 2022
Communication of a notice of opposition and request to file observations
Apr 11, 2022
Notice of further oppositions to opponent(s)
Apr 7, 2022
(Electronic) Receipt
Apr 7, 2022
Letter accompanying subsequently filed items
Apr 7, 2022
Letter regarding the opposition procedure (no time limit)
Apr 5, 2022
Communication of a notice of opposition - first information to patent proprietor
Mar 29, 2022
(Electronic) Receipt
Mar 29, 2022
Citation in opposition procedure - 001
Mar 29, 2022
Citation in opposition procedure - 002
Mar 29, 2022
Citation in opposition procedure - 003
Mar 29, 2022
Citation in opposition procedure - 004
Mar 29, 2022
Citation in opposition procedure - 005
Mar 29, 2022
Citation in opposition procedure - 006
Mar 29, 2022
Citation in opposition procedure - 007
Mar 29, 2022
Notice of opposition
Mar 29, 2022
Notice of opposition
Jul 13, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jun 4, 2021
Decision to grant a European patent
May 20, 2021
(Electronic) Receipt
May 20, 2021
Filing of the translations of the claims
May 20, 2021
French translation of claims
May 20, 2021
German translation of the claims
May 20, 2021
Letter accompanying subsequently filed items
Feb 11, 2021
Bibliographic data of the European patent application
Feb 11, 2021
Communication about intention to grant a European patent
Feb 11, 2021
Intention to grant (signatures)
Feb 11, 2021
Text intended for grant (clean copy)
Feb 11, 2021
Text intended for grant (version for approval)
Aug 7, 2020
(Electronic) Receipt
Aug 7, 2020
Amended claims with annotations
Aug 7, 2020
Claims
Aug 7, 2020
Letter accompanying subsequently filed items
Aug 7, 2020
Reply to communication from the Examining Division
Apr 8, 2020
Annex to the communication
Apr 8, 2020
Communication from the Examining Division
Apr 2, 2020
Examination started
Aug 28, 2019
(Electronic) Receipt
Aug 28, 2019
Letter accompanying subsequently filed items
Aug 28, 2019
Reply to Written Opinion prepared by the EPO
Aug 28, 2019
Translation of priority document
Apr 9, 2019
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Mar 22, 2019
Communication regarding the transmission of the European search report
Mar 22, 2019
European search opinion
Mar 22, 2019
Information on Search Strategy
Mar 22, 2019
Supplementary European search report
Mar 7, 2019
Search started
Sep 19, 2018
(Electronic) Receipt
Sep 19, 2018
Amended claims filed after receipt of (European) search report
Sep 19, 2018
Amendments received before examination
Sep 19, 2018
Letter accompanying subsequently filed items
May 30, 2018
Invitation to indicate correct address of inventor
May 30, 2018
Notification of forthcoming publication
May 17, 2018
Letter which had not been notified
Mar 27, 2018
Communication regarding possible amendment of the application/payment of claims fee
Mar 23, 2018
Communication to designated inventor
Mar 23, 2018
Communication to designated inventor
Mar 23, 2018
Communication to designated inventor
Mar 6, 2018
Copy of the international preliminary report on patentability
Mar 6, 2018
Translation of the international preliminary report on patentability
Feb 7, 2018
(Electronic) Receipt
Feb 7, 2018
Abstract
Feb 7, 2018
Claims
Feb 7, 2018
Description
Feb 7, 2018
Request for entry into the European phase
Jan 4, 2018
Information on entry into European phase
Mar 13, 2017
Priority document (electronically transmitted)
Feb 23, 2017
Copy of the international search report
Feb 23, 2017
Copy of the translated international search report
Feb 23, 2017
International publication pamphlet

EP3338779

EISAI R&D MANAGEMENT

Application Number: EP16837150A
Filing Date: Aug 18, 2016
Status: Revoked; Aug 30, 2025
Publication Date: Jun 30, 2021
External Links: Slate, Register , Google Patents

IP Verse

Tumor Therapeutic Agent

Patent Summary

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Patent Oppositions

Dossier Documents

EP3338779