Synthesis Of Hydrogen Bis(Fluorosulfonyl)Imide

Patent No. EP3024779 (titled "Synthesis Of Hydrogen Bis(Fluorosulfonyl)Imide") was filed by Coorstek Fluorochemicals on Mar 24, 2014. The application was issued on Oct 1, 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
STRAWMAN	Apr 16, 2020	ZEHETNER
CABINET NONY	Apr 14, 2020	-

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

Get instant alerts for new documents

Sep 4, 2025
Decision to maintain the European patent in amended form
Sep 4, 2025
Decision to maintain the European patent in amended form
Sep 4, 2025
Decision to maintain the European patent in amended form
Aug 20, 2025
(Electronic) Receipt
Aug 20, 2025
French translation of claims
Aug 20, 2025
German translation of the claims
Aug 20, 2025
Letter accompanying subsequently filed items
May 30, 2025
Communication of bibliographic data
May 30, 2025
Communication to opponent concerning maintenance
May 30, 2025
Communication to opponent concerning maintenance
May 30, 2025
Communication with request to file translations
May 26, 2025
Maintenance of the patent with the documents specified in the final decision
Feb 19, 2025
Brief communication - Opposition proceedings
Feb 19, 2025
Brief communication - Opposition proceedings
Feb 19, 2025
Brief communication - Opposition proceedings
Feb 19, 2025
Decision of the Opposition Division and instruction
Feb 19, 2025
Druckexemplar in opposition procedure
Feb 19, 2025
Grounds for the decision (Annex) - opposition
Feb 19, 2025
Interlocutory decision in opposition proceedings
Feb 19, 2025
Interlocutory decision in opposition proceedings
Feb 19, 2025
Interlocutory decision in opposition proceedings
Feb 19, 2025
Means of redress
Sep 9, 2024
Brief communication - Opposition proceedings
Sep 9, 2024
Brief communication - Opposition proceedings
Sep 9, 2024
Brief communication - Opposition proceedings
Sep 5, 2024
Communication inviting the parties to file observations
Sep 5, 2024
Communication inviting the parties to file observations
Sep 5, 2024
Communication inviting the parties to file observations
May 24, 2024
Brief communication - Opposition proceedings
May 24, 2024
Brief communication - Opposition proceedings
May 17, 2024
(Electronic) Receipt
May 17, 2024
Amended description with annotations
May 17, 2024
Description
May 17, 2024
Letter accompanying subsequently filed items
May 17, 2024
Reply to an examination report in opposition proceedings
Mar 21, 2024
Annex to the communication - opposition
Mar 21, 2024
Brief communication - Opposition proceedings
Mar 21, 2024
Brief communication - Opposition proceedings
Mar 21, 2024
Brief communication - Opposition proceedings
Mar 21, 2024
Communication inviting the parties to file observations
Mar 21, 2024
Communication inviting the parties to file observations
Mar 21, 2024
Communication inviting the parties to file observations
Jan 24, 2024
(Electronic) Receipt
Jan 24, 2024
Advice of delivery
Jan 24, 2024
Letter accompanying subsequently filed items
Jan 16, 2024
Decision of the Board of Appeal
Jan 16, 2024
Decision of the Board of Appeal
Jan 16, 2024
F3032 Notification(s) of the decision
Jan 16, 2024
F3032 Notification(s) of the decision
Jan 16, 2024
F3032 Notification(s) of the decision
Jan 1, 2024
Request for change of opponent's representative
Nov 28, 2023
F3013 Oral Proceedings: Forwarding minutes
Nov 28, 2023
F3013 Oral Proceedings: Forwarding minutes
Nov 28, 2023
F3013 Oral Proceedings: Forwarding minutes
Nov 28, 2023
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Nov 28, 2023
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Oct 26, 2023
F3018 Oral proceedings: Confirmation interpreters
Oct 26, 2023
F3018 Oral proceedings: Confirmation interpreters
Oct 26, 2023
F3345 Forwarding of submissions to parties
Oct 26, 2023
F3345 Forwarding of submissions to parties
Oct 23, 2023
Letter dealing with oral proceedings
Oct 10, 2023
(Electronic) Receipt
Oct 10, 2023
(Electronic) Receipt
Oct 10, 2023
Advice of delivery
Oct 10, 2023
Advice of delivery
Oct 10, 2023
Letter accompanying subsequently filed items
Oct 10, 2023
Letter accompanying subsequently filed items
Oct 6, 2023
F3345 Forwarding of submissions to parties
Oct 6, 2023
F3345 Forwarding of submissions to parties
Oct 2, 2023
Communication about missing proof of delivery
Sep 27, 2023
(Electronic) Receipt
Sep 27, 2023
(Electronic) Receipt
Sep 27, 2023
Advice of delivery
Sep 27, 2023
Letter accompanying subsequently filed items
Sep 27, 2023
Letter accompanying subsequently filed items
Sep 27, 2023
Letter dealing with oral proceedings during the appeal procedure
Aug 29, 2023
F3345 Forwarding of submissions to parties
Aug 29, 2023
F3345 Forwarding of submissions to parties
Aug 28, 2023
Advice of delivery
Aug 28, 2023
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Aug 28, 2023
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Aug 28, 2023
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Aug 28, 2023
F3345 Forwarding of submissions to parties
Aug 28, 2023
F3345 Forwarding of submissions to parties
Aug 28, 2023
Oral proceedings: change of venue
Aug 28, 2023
Oral proceedings: change of venue
Aug 28, 2023
Oral proceedings: change of venue
Aug 24, 2023
(Electronic) Receipt
Aug 24, 2023
Letter accompanying subsequently filed items
Aug 24, 2023
Request for interpreters during oral proceedings
Aug 22, 2023
(Electronic) Receipt
Aug 22, 2023
Letter accompanying subsequently filed items
Aug 22, 2023
Request for interpreters during oral proceedings
Aug 11, 2023
F3345 Forwarding of submissions to parties
Aug 11, 2023
F3345 Forwarding of submissions to parties
Aug 8, 2023
(Electronic) Receipt
Aug 8, 2023
Letter accompanying subsequently filed items
Aug 8, 2023
Letter dealing with oral proceedings during the appeal procedure
Jul 21, 2023
(Electronic) Receipt
Jul 21, 2023
Advice of delivery
Jul 21, 2023
Letter accompanying subsequently filed items
Jul 17, 2023
Advice of delivery
Jul 17, 2023
F3011.1 Oral Proceedings: summons
Jul 17, 2023
F3011.1 Oral Proceedings: summons
Jul 17, 2023
F3011.1 Oral Proceedings: summons
Jul 12, 2023
F3010 Oral proceedings: order for summons
Jul 12, 2023
F3303.17 Change of the composition of the Board (T), in case Chairman is a legal member
Jan 31, 2023
F3345 Forwarding of submissions to parties
Jan 31, 2023
F3345 Forwarding of submissions to parties
Jan 25, 2023
(Electronic) Receipt
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Amended claims with annotations
Jan 25, 2023
Auxiliary request during appeals procedure - 01
Jan 25, 2023
Auxiliary request during appeals procedure - 02
Jan 25, 2023
Auxiliary request during appeals procedure - 03
Jan 25, 2023
Auxiliary request during appeals procedure - 04
Jan 25, 2023
Auxiliary request during appeals procedure - 05
Jan 25, 2023
Auxiliary request during appeals procedure - 06
Jan 25, 2023
Auxiliary request during appeals procedure - 07
Jan 25, 2023
Letter accompanying subsequently filed items
Jan 25, 2023
Main request during appeals procedure
Jan 25, 2023
Reply to appeal
Sep 29, 2022
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Sep 29, 2022
F3345 Forwarding of submissions to parties
Sep 26, 2022
(Electronic) Receipt
Sep 26, 2022
Citation in appeal procedure - 006
Sep 26, 2022
Citation in appeal procedure - 025
Sep 26, 2022
Letter accompanying subsequently filed items
Sep 26, 2022
Letter relating to Appeal Procedure
Sep 26, 2022
Statement of grounds of appeal
Aug 16, 2022
Composition of the board (T)
Jul 12, 2022
F3204 Communication of the file number to the parties
Jul 12, 2022
F3204 Communication of the file number to the parties
Jul 12, 2022
F3204 Communication of the file number to the parties
Jul 5, 2022
(Electronic) Receipt
Jul 5, 2022
Letter accompanying subsequently filed items
Jul 5, 2022
Notice of appeal
Jun 30, 2022
(Electronic) Receipt
Jun 30, 2022
Advice of delivery
Jun 30, 2022
Letter accompanying subsequently filed items
Jun 28, 2022
Communication about missing advice of delivery
Jun 2, 2022
Advice of delivery
May 30, 2022
Advice of delivery
May 27, 2022
Annex to the communication - opposition
May 27, 2022
Decision of the Opposition Division and instruction
May 27, 2022
Decision rejecting the opposition
May 27, 2022
Decision rejecting the opposition
May 27, 2022
Decision rejecting the opposition
May 27, 2022
Grounds for the decision (Annex) - opposition
May 27, 2022
Means of redress
May 27, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
May 27, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
May 27, 2022
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
May 27, 2022
Provision of a copy of the minutes - opposition procedure
May 27, 2022
Provision of a copy of the minutes - opposition procedure
May 27, 2022
Provision of a copy of the minutes - opposition procedure
May 27, 2022
Provision of a copy of the minutes of oral proceedings
May 27, 2022
Transmittal of decision / summons - opposition
May 27, 2022
Transmittal of decision / summons - opposition
May 27, 2022
Transmittal of decision / summons - opposition
Jan 11, 2022
Information about the result of oral proceedings
Jan 7, 2022
Brief communication - Opposition proceedings
Jan 7, 2022
Brief communication - Opposition proceedings
Dec 28, 2021
(Electronic) Receipt
Dec 28, 2021
Letter accompanying subsequently filed items
Dec 28, 2021
Written submission in preparation to/during oral proceedings
Nov 16, 2021
Brief communication - Opposition proceedings
Nov 16, 2021
Brief communication - Opposition proceedings
Nov 15, 2021
Brief communication - Opposition proceedings
Nov 15, 2021
Brief communication - Opposition proceedings
Nov 12, 2021
Brief communication - Opposition proceedings
Nov 12, 2021
Brief communication - Opposition proceedings
Nov 10, 2021
(Electronic) Receipt
Nov 10, 2021
(Electronic) Receipt
Nov 10, 2021
Letter accompanying subsequently filed items
Nov 10, 2021
Letter accompanying subsequently filed items
Nov 10, 2021
Written submission in preparation to/during oral proceedings
Nov 10, 2021
Written submission in preparation to/during oral proceedings
Nov 8, 2021
(Electronic) Receipt
Nov 8, 2021
Citation in opposition procedure - 006
Nov 8, 2021
Citation in opposition procedure - 022
Nov 8, 2021
Citation in opposition procedure - 023
Nov 8, 2021
Citation in opposition procedure - 024
Nov 8, 2021
Consolidated list of cited opposition documents
Nov 8, 2021
Letter accompanying subsequently filed items
Nov 8, 2021
Written submission in preparation to/during oral proceedings
Nov 3, 2021
Brief communication - Opposition proceedings
Nov 3, 2021
Brief communication - Opposition proceedings
Oct 28, 2021
(Electronic) Receipt
Oct 28, 2021
Letter accompanying subsequently filed items
Oct 28, 2021
Written submission in preparation to/during oral proceedings
Oct 4, 2021
Notification concerning the date of oral proceedings
Oct 4, 2021
Notification concerning the date of oral proceedings
Oct 4, 2021
Notification concerning the date of oral proceedings
Jan 7, 2021
(Electronic) Receipt
Jan 7, 2021
Advice of delivery
Jan 7, 2021
Letter accompanying subsequently filed items
Jan 5, 2021
(Electronic) Receipt
Jan 5, 2021
Advice of delivery
Jan 5, 2021
Letter accompanying subsequently filed items
Dec 31, 2020
(Electronic) Receipt
Dec 31, 2020
Advice of delivery
Dec 31, 2020
Letter accompanying subsequently filed items
Dec 23, 2020
Annex to the communication - opposition
Dec 23, 2020
Information concerning oral proceedings
Dec 23, 2020
Summons to attend oral proceedings
Dec 23, 2020
Summons to attend oral proceedings
Dec 23, 2020
Summons to attend oral proceedings
Dec 23, 2020
Transmittal of decision / summons - opposition
Dec 23, 2020
Transmittal of decision / summons - opposition
Dec 23, 2020
Transmittal of decision / summons - opposition
Nov 20, 2020
Brief communication - Opposition proceedings
Nov 12, 2020
Letter which had not been notified
Oct 12, 2020
Brief communication - Opposition proceedings
Oct 12, 2020
Brief communication - Opposition proceedings
Oct 2, 2020
(Electronic) Receipt
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure
Oct 2, 2020
Auxiliary request during Opposition procedure - 01
Oct 2, 2020
Auxiliary request during Opposition procedure - 02
Oct 2, 2020
Auxiliary request during Opposition procedure - 03
Oct 2, 2020
Auxiliary request during Opposition procedure - 04
Oct 2, 2020
Auxiliary request during Opposition procedure - 05
Oct 2, 2020
Auxiliary request during Opposition procedure - 06
Oct 2, 2020
Auxiliary request during Opposition procedure - 07
Oct 2, 2020
Citation in opposition procedure - 016
Oct 2, 2020
Citation in opposition procedure - 017
Oct 2, 2020
Citation in opposition procedure - 018
Oct 2, 2020
Citation in opposition procedure - 019
Oct 2, 2020
Citation in opposition procedure - 020
Oct 2, 2020
Citation in opposition procedure - 021
Oct 2, 2020
Main request during Opposition procedure
Oct 2, 2020
Reply of the patent proprietor to the notice(s) of opposition
Oct 2, 2020
Request for interpreters during oral proceedings
Jul 15, 2020
Letter which had not been notified
Jun 18, 2020
Communication of a notice of opposition and request to file observations
Jun 18, 2020
Notice of further oppositions to opponent(s)
Jun 18, 2020
Notice of further oppositions to opponent(s)
Apr 23, 2020
Communication of a notice of opposition - first information to patent proprietor
Apr 20, 2020
Communication of a notice of opposition - first information to patent proprietor
Apr 16, 2020
(Electronic) Receipt
Apr 16, 2020
Citation in opposition procedure - 015
Apr 16, 2020
Citation in opposition procedure - 015
Apr 16, 2020
Notice of opposition
Apr 16, 2020
Notice of opposition
Apr 14, 2020
(Electronic) Receipt
Apr 14, 2020
Citation in opposition procedure - 001
Apr 14, 2020
Citation in opposition procedure - 002
Apr 14, 2020
Citation in opposition procedure - 003
Apr 14, 2020
Citation in opposition procedure - 004
Apr 14, 2020
Citation in opposition procedure - 005
Apr 14, 2020
Citation in opposition procedure - 006
Apr 14, 2020
Citation in opposition procedure - 007
Apr 14, 2020
Citation in opposition procedure - 008
Apr 14, 2020
Citation in opposition procedure - 009
Apr 14, 2020
Citation in opposition procedure - 010
Apr 14, 2020
Citation in opposition procedure - 011
Apr 14, 2020
Citation in opposition procedure - 012
Apr 14, 2020
Citation in opposition procedure - 013
Apr 14, 2020
Citation in opposition procedure - 014
Apr 14, 2020
Notice of opposition
Apr 14, 2020
Notice of opposition
Sep 23, 2019
Brief communication to applicant/representative (Legal Division)
Sep 19, 2019
Communication of the registration of a transfer or change of name and/or address
Sep 19, 2019
Communication of the registration of a transfer or change of name and/or address
Aug 26, 2019
(Electronic) Receipt
Aug 26, 2019
(Electronic) Receipt
Aug 26, 2019
Annexes in respect of a client data request
Aug 26, 2019
Annexes in respect of a client data request
Aug 26, 2019
Annexes in respect of a client data request
Aug 26, 2019
Annexes in respect of a client data request
Aug 26, 2019
Letter accompanying subsequently filed items
Aug 26, 2019
Letter accompanying subsequently filed items
Aug 26, 2019
Miscellaneous requests concerning client data
Aug 26, 2019
Miscellaneous requests concerning client data
Jul 29, 2019
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jul 8, 2019
Indication of deficiencies in a request for registering a transfer of rights and invitation to correct them
Jun 27, 2019
(Electronic) Receipt
Jun 27, 2019
Annexes in respect of a client data request
Jun 27, 2019
Annexes in respect of a client data request
Jun 27, 2019
Letter accompanying subsequently filed items
Jun 27, 2019
Submission concerning a transfer of rights (applicant)
Jun 21, 2019
Decision to grant a European patent
Jun 7, 2019
Bibliographic data of the European patent application
Jun 7, 2019
Information about intention to grant a patent
Jun 7, 2019
Intention to grant (signatures)
Jun 7, 2019
Text intended for grant (clean copy)
Jun 7, 2019
Text intended for grant (version for approval)
May 27, 2019
Decision to allow further processing
May 15, 2019
(Electronic) Receipt
May 15, 2019
Claims
May 15, 2019
French translation of claims
May 15, 2019
German translation of the claims
May 15, 2019
Letter accompanying subsequently filed items
May 15, 2019
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
May 15, 2019
Request for further processing
May 8, 2019
Application deemed to be withdrawn ( translations of claims/payment missing)
May 6, 2019
Notice drawing attention to the payment of the renewal fee and additional fee
Dec 5, 2018
Confirmation of revocation of automatic debit order
Nov 30, 2018
Letter relating to the automatic debiting procedure
Nov 15, 2018
Bibliographic data of the European patent application
Nov 15, 2018
Communication about intention to grant a European patent
Nov 15, 2018
Intention to grant (signatures)
Nov 15, 2018
Text intended for grant (clean copy)
Nov 15, 2018
Text intended for grant (version for approval)
Oct 1, 2018
(Electronic) Receipt
Oct 1, 2018
Amended claims with annotations
Oct 1, 2018
Claims
Oct 1, 2018
Description
Oct 1, 2018
Letter accompanying subsequently filed items
Oct 1, 2018
Reply to communication from the Examining Division
Jun 1, 2018
Annex to the communication
Jun 1, 2018
Communication from the Examining Division
May 22, 2018
Examination started
Mar 28, 2018
Letter relating to the automatic debiting procedure
Feb 21, 2018
Request for correction of obvious mistakes allowed
Jan 5, 2018
(Electronic) Receipt
Jan 5, 2018
Annex
Jan 5, 2018
Annex
Jan 5, 2018
Letter accompanying subsequently filed items
Jan 5, 2018
Request for correction of errors in filed documents
Nov 8, 2017
Communication for party to proceedings/third party
Oct 26, 2017
(Electronic) Receipt
Oct 26, 2017
Annex
Oct 26, 2017
Letter accompanying subsequently filed items
Oct 26, 2017
Request for correction of errors in filed documents
Aug 31, 2017
(Electronic) Receipt
Aug 31, 2017
Citation for the examination procedure
Aug 31, 2017
Letter accompanying subsequently filed items
Aug 31, 2017
Reply to Written Opinion prepared by the EPO
Aug 17, 2017
Communication for party to proceedings/third party
Aug 8, 2017
Request for correction of errors in filed documents
Aug 7, 2017
(Electronic) Receipt
Aug 7, 2017
Annex
Aug 7, 2017
Annex
Aug 7, 2017
Letter accompanying subsequently filed items
Aug 7, 2017
Request for correction of errors in filed documents
Aug 7, 2017
Request for correction of errors in filed documents
Aug 4, 2017
(Electronic) Receipt
Aug 4, 2017
Letter accompanying subsequently filed items
Aug 4, 2017
Matter concerning the application
May 30, 2017
Confirmation of revocation of automatic debit order
May 25, 2017
Letter relating to the automatic debiting procedure
Mar 2, 2017
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Feb 13, 2017
Communication regarding the transmission of the European search report
Feb 13, 2017
European search opinion
Feb 13, 2017
Information on Search Strategy
Feb 13, 2017
Supplementary European search report
Feb 1, 2017
Search started
Sep 20, 2016
(Electronic) Receipt
Sep 20, 2016
Amended claims filed after receipt of (European) search report
Sep 20, 2016
Amended claims with annotations
Sep 20, 2016
Amendments received before examination
Sep 20, 2016
Letter accompanying subsequently filed items
May 4, 2016
Notification on forthcoming publication of bibliographic data
Mar 11, 2016
Communication regarding possible amendment of the application/payment of claims fee
Mar 7, 2016
Communication to designated inventor
Mar 7, 2016
Communication to designated inventor
Mar 7, 2016
Communication to designated inventor
Feb 23, 2016
(Electronic) Receipt
Feb 23, 2016
Request for entry into the European phase
Feb 9, 2016
Copy of the international preliminary report on patentability
Dec 23, 2015
Information on entry into European phase
Nov 17, 2015
Notification of the recording of a change
Feb 16, 2015
Priority document (electronically transmitted)
Jan 29, 2015
Copy of the international search report
Jan 29, 2015
Published international application - A1

EP3024779

COORSTEK FLUOROCHEMICALS

Application Number: EP14828653A
Filing Date: Mar 24, 2014
Status: Patent Maintained As Amended; Aug 29, 2025
Publication Date: Oct 1, 2025
External Links: Slate, Register , Google Patents

IP Verse

Synthesis Of Hydrogen Bis(Fluorosulfonyl)Imide

Patent Summary

Patent Family

Patent Oppositions (2)

Dossier Documents

EP3024779