A Stable Parenteral Dosage Form Of Cetrorelix Acetate

Patent No. EP3811927 (titled "A Stable Parenteral Dosage Form Of Cetrorelix Acetate") was filed by SUN Pharmaceutical Industries on Mar 10, 2020. The application was issued on Feb 23, 2022.

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
WEICKMANN & WEICKMANN	Aug 12, 2022	-

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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Jan 20, 2026
Annex to the communication - opposition
Jan 20, 2026
Communication inviting the parties to file observations
Jan 20, 2026
Communication inviting the parties to file observations
Nov 28, 2025
Decision of the Board of Appeal
Nov 28, 2025
F3032 Notification(s) of the decision
Nov 28, 2025
F3032 Notification(s) of the decision
Nov 25, 2025
F3303.16 Change of composition of the Board (T)
Nov 18, 2025
F3345 Forwarding of submissions to parties
Nov 13, 2025
(Electronic) Receipt
Nov 13, 2025
General enquiry
Nov 13, 2025
Letter accompanying subsequently filed items
Sep 29, 2025
Communication of amended entries in the Register of European Patents
Sep 29, 2025
F3345 Forwarding of submissions to parties
Sep 25, 2025
F3013 Oral Proceedings: Forwarding minutes
Sep 25, 2025
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Aug 26, 2025
F3345 Forwarding of submissions to parties
Aug 25, 2025
(Electronic) Receipt
Aug 25, 2025
Citation in appeal procedure - 017
Aug 25, 2025
Letter accompanying subsequently filed items
Aug 25, 2025
Letter dealing with oral proceedings during the appeal procedure
Jul 24, 2025
F3345 Forwarding of submissions to parties
Jul 23, 2025
(Electronic) Receipt
Jul 23, 2025
Letter accompanying subsequently filed items
Jul 23, 2025
Letter dealing with oral proceedings during the appeal procedure
May 2, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
May 2, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Mar 11, 2025
F3345 Forwarding of submissions to parties
Mar 7, 2025
(Electronic) Receipt
Mar 7, 2025
Amended claims with annotations
Mar 7, 2025
Amended claims with annotations
Mar 7, 2025
Auxiliary request during appeals procedure - 08
Mar 7, 2025
Auxiliary request during appeals procedure - 09
Mar 7, 2025
Letter accompanying subsequently filed items
Mar 7, 2025
Letter relating to Appeal Procedure
Feb 11, 2025
Communication of amended entries concerning the representative
Feb 6, 2025
Letter accompanying subsequently filed items
Feb 6, 2025
Submission concerning change of applicant's representative
Oct 18, 2024
F3345 Forwarding of submissions to parties
Oct 17, 2024
(Electronic) Receipt
Oct 17, 2024
Citation in appeal procedure - 016
Oct 17, 2024
Letter accompanying subsequently filed items
Oct 17, 2024
Letter dealing with oral proceedings during the appeal procedure
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 1, 2024
Composition of the board (T)
Jun 17, 2024
F3345 Forwarding of submissions to parties
Jun 12, 2024
(Electronic) Receipt
Jun 12, 2024
Annexes (other than cited documents) regarding appeal procedure
Jun 12, 2024
Letter accompanying subsequently filed items
Jun 12, 2024
Reply to appeal
Feb 14, 2024
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Feb 9, 2024
(Electronic) Receipt
Feb 9, 2024
Letter accompanying subsequently filed items
Feb 9, 2024
Statement of grounds of appeal
Dec 5, 2023
F3204 Communication of the file number to the parties
Dec 5, 2023
F3204 Communication of the file number to the parties
Nov 30, 2023
(Electronic) Receipt
Nov 30, 2023
Notice of appeal
Nov 30, 2023
Notice of appeal
Nov 21, 2023
Advice of delivery
Nov 10, 2023
(Electronic) Receipt
Nov 10, 2023
Advice of delivery
Nov 10, 2023
Letter accompanying subsequently filed items
Nov 9, 2023
Annex to the communication - opposition
Nov 9, 2023
Decision of the Opposition Division and instruction
Nov 9, 2023
Druckexemplar in opposition procedure
Nov 9, 2023
Grounds for the decision (Annex) - opposition
Nov 9, 2023
Interlocutory decision in opposition proceedings
Nov 9, 2023
Interlocutory decision in opposition proceedings
Nov 9, 2023
Means of redress
Nov 9, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Nov 9, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Nov 9, 2023
Provision of a copy of the minutes - opposition procedure
Nov 9, 2023
Provision of a copy of the minutes - opposition procedure
Nov 9, 2023
Scanned annex to a communication - opposition procedure
Nov 9, 2023
Scanned annex to a communication - opposition procedure
Nov 9, 2023
Scanned annex to a communication - opposition procedure
Nov 9, 2023
Scanned annex to a communication - opposition procedure
Nov 9, 2023
Transmittal of decision / summons - opposition
Nov 9, 2023
Transmittal of decision / summons - opposition
Oct 24, 2023
Information about the result of oral proceedings
Sep 18, 2023
Brief communication - Opposition proceedings
Sep 13, 2023
(Electronic) Receipt
Sep 13, 2023
Letter accompanying subsequently filed items
Sep 13, 2023
Written submission in preparation to/during oral proceedings
Aug 30, 2023
Brief communication - Opposition proceedings
Aug 29, 2023
Brief communication - Opposition proceedings
Aug 25, 2023
(Electronic) Receipt
Aug 25, 2023
(Electronic) Receipt
Aug 25, 2023
Letter accompanying subsequently filed items
Aug 25, 2023
Letter accompanying subsequently filed items
Aug 25, 2023
Request for interpreters during oral proceedings
Aug 23, 2023
(Electronic) Receipt
Aug 23, 2023
Citation in opposition procedure - 014
Aug 23, 2023
Citation in opposition procedure - 014
Aug 23, 2023
Consolidated list of cited opposition documents
Aug 23, 2023
Letter accompanying subsequently filed items
Aug 23, 2023
Written submission in preparation to/during oral proceedings
Feb 28, 2023
Advice of delivery
Feb 21, 2023
Advice of delivery
Feb 21, 2023
Annex to the communication - opposition
Feb 21, 2023
Information concerning oral proceedings
Feb 21, 2023
Scanned annex to a communication - opposition procedure
Feb 21, 2023
Summons to attend oral proceedings
Feb 21, 2023
Summons to attend oral proceedings
Feb 21, 2023
Transmittal of decision / summons - opposition
Feb 21, 2023
Transmittal of decision / summons - opposition
Jan 16, 2023
Brief communication - Opposition proceedings
Jan 10, 2023
(Electronic) Receipt
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure
Jan 10, 2023
Auxiliary request during Opposition procedure - 01
Jan 10, 2023
Auxiliary request during Opposition procedure - 02
Jan 10, 2023
Auxiliary request during Opposition procedure - 03
Jan 10, 2023
Auxiliary request during Opposition procedure - 04
Jan 10, 2023
Auxiliary request during Opposition procedure - 05
Jan 10, 2023
Auxiliary request during Opposition procedure - 06
Jan 10, 2023
Auxiliary request during Opposition procedure - 07
Jan 10, 2023
Letter accompanying subsequently filed items
Jan 10, 2023
Main request during Opposition procedure
Jan 10, 2023
Main request during Opposition procedure
Jan 10, 2023
Reply of the patent proprietor to the notice(s) of opposition
Aug 31, 2022
Communication of a notice of opposition and request to file observations
Aug 31, 2022
Notice of further oppositions to opponent(s)
Aug 19, 2022
Communication of a notice of opposition - first information to patent proprietor
Aug 12, 2022
(Electronic) Receipt
Aug 12, 2022
Citation in opposition procedure - 001
Aug 12, 2022
Citation in opposition procedure - 002
Aug 12, 2022
Citation in opposition procedure - 003
Aug 12, 2022
Citation in opposition procedure - 004
Aug 12, 2022
Citation in opposition procedure - 005
Aug 12, 2022
Citation in opposition procedure - 006
Aug 12, 2022
Citation in opposition procedure - 007
Aug 12, 2022
Citation in opposition procedure - 008
Aug 12, 2022
Citation in opposition procedure - 009
Aug 12, 2022
Citation in opposition procedure - 010
Aug 12, 2022
Citation in opposition procedure - 011
Aug 12, 2022
Citation in opposition procedure - 012
Aug 12, 2022
Citation in opposition procedure - 013
Aug 12, 2022
Notice of opposition
Aug 12, 2022
Notice of opposition
Jan 17, 2022
Correction to published European patent application/patent specification
Dec 7, 2021
(Electronic) Receipt
Dec 7, 2021
Letter accompanying subsequently filed items
Dec 7, 2021
Request for correction of the publication
Nov 30, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Oct 21, 2021
Decision to grant a European patent
Oct 7, 2021
(Electronic) Receipt
Oct 7, 2021
Filing of the translations of the claims
Oct 7, 2021
French translation of claims
Oct 7, 2021
German translation of the claims
Oct 7, 2021
Letter accompanying subsequently filed items
Jul 23, 2021
Bibliographic data of the European patent application
Jul 23, 2021
Communication about intention to grant a European patent
Jul 23, 2021
Intention to grant (signatures)
Jul 23, 2021
Text intended for grant (clean copy)
Jul 23, 2021
Text intended for grant (version for approval)
Jul 6, 2021
Examination started
Jun 4, 2021
(Electronic) Receipt
Jun 4, 2021
Letter accompanying subsequently filed items
Jun 4, 2021
Statement of non-availability of priority search results
May 20, 2021
(Electronic) Receipt
May 20, 2021
Enquiry as to when a communication from the Examining Division can be expected
May 20, 2021
Letter accompanying subsequently filed items
May 3, 2021
Information about publication, reminder payment of designation fee, response to extended European search report, if applicable
Apr 14, 2021
Invitation to file a copy of search results(priority)
Apr 4, 2021
(Electronic) Receipt
Apr 4, 2021
Amended claims filed after receipt of (European) search report
Apr 4, 2021
Amended claims with annotations
Apr 4, 2021
Amendments received before examination
Apr 4, 2021
Citation for the examination procedure
Apr 4, 2021
Letter accompanying subsequently filed items
Mar 31, 2021
Notification of forthcoming publication
Sep 10, 2020
Letter concerning the priority
Sep 10, 2020
Priority document
Sep 9, 2020
Communication regarding the transmission of the European search report
Sep 9, 2020
European search opinion
Sep 9, 2020
European search report
Sep 9, 2020
Information on Search Strategy
Sep 1, 2020
Search started
May 4, 2020
Communication to designated inventor
May 4, 2020
Communication to designated inventor
May 4, 2020
Communication to designated inventor
May 4, 2020
Communication to designated inventor
May 4, 2020
Communication to designated inventor
May 4, 2020
Communication to designated inventor
Mar 10, 2020
Abstract
Mar 10, 2020
Acknowledgement of receipt of electronic submission of the request for grant of a European patent
Mar 10, 2020
Claims
Mar 10, 2020
Description
Mar 10, 2020
Designation of inventor
Mar 10, 2020
Request for grant of a European patent

EP3811927

SUN PHARMACEUTICAL INDUSTRIES

Application Number: EP20162018A
Filing Date: Mar 10, 2020
Status: Granted And Under Opposition; Oct 15, 2021
Publication Date: Feb 23, 2022
External Links: Slate, Register , Google Patents

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A Stable Parenteral Dosage Form Of Cetrorelix Acetate

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Dossier Documents

EP3811927