Polymer Electrolyte Film

Patent No. EP3065209 (titled "Polymer Electrolyte Film") was filed by Asahi Kasei Kabushiki Kaisha on Dec 1, 2014. The application was issued on Nov 5, 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
WESS	Jan 10, 2020	SSM SANDMAIR

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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Oct 9, 2025
Decision to maintain the European patent in amended form
Oct 9, 2025
Decision to maintain the European patent in amended form
Sep 30, 2025
(Electronic) Receipt
Sep 30, 2025
Filing of the translation of the amended claims
Sep 30, 2025
French translation of claims
Sep 30, 2025
German translation of the claims
Sep 30, 2025
Letter accompanying subsequently filed items
Sep 8, 2025
Brief communication - Opposition proceedings
Sep 8, 2025
Communication of the registration of a transfer or change of name and/or address
Aug 25, 2025
(Electronic) Receipt
Aug 25, 2025
Letter accompanying subsequently filed items
Aug 25, 2025
Submission concerning change of proprietor's address
Jul 17, 2025
Brief communication - Opposition proceedings
Jul 17, 2025
Communication of bibliographic data
Jul 17, 2025
Communication to opponent concerning maintenance
Jul 17, 2025
Communication with request to file translations
Jul 14, 2025
(Electronic) Receipt
Jul 14, 2025
Letter accompanying subsequently filed items
Jul 14, 2025
Letter regarding the opposition procedure (no time limit)
Jul 14, 2025
Maintenance of the patent with the documents specified in the final decision
Mar 14, 2025
Brief communication - Opposition proceedings
Mar 14, 2025
Brief communication - Opposition proceedings
Mar 14, 2025
Decision of the Opposition Division and instruction
Mar 14, 2025
Druckexemplar in opposition procedure
Mar 14, 2025
Grounds for the decision (Annex) - opposition
Mar 14, 2025
Interlocutory decision in opposition proceedings
Mar 14, 2025
Interlocutory decision in opposition proceedings
Mar 14, 2025
Means of redress
Nov 19, 2024
Brief communication - Opposition proceedings
Nov 14, 2024
(Electronic) Receipt
Nov 14, 2024
Amended description with annotations
Nov 14, 2024
Description
Nov 14, 2024
Letter accompanying subsequently filed items
Nov 14, 2024
Reply to an examination report in opposition proceedings
Oct 8, 2024
Annex to the communication - opposition
Oct 8, 2024
Brief communication - Opposition proceedings
Oct 8, 2024
Brief communication - Opposition proceedings
Oct 8, 2024
Communication inviting the parties to file observations
Oct 8, 2024
Communication inviting the parties to file observations
Sep 25, 2024
Decision of the Board of Appeal
Sep 25, 2024
Decision of the Board of Appeal
Sep 25, 2024
F3032 Notification(s) of the decision
Sep 25, 2024
F3032 Notification(s) of the decision
Jul 12, 2024
F3013 Oral Proceedings: Forwarding minutes
Jul 12, 2024
F3013 Oral Proceedings: Forwarding minutes
Jul 12, 2024
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Jul 12, 2024
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Jun 14, 2024
(Electronic) Receipt
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Amended claims with annotations
Jun 14, 2024
Auxiliary request during appeals procedure - 01
Jun 14, 2024
Auxiliary request during appeals procedure - 02
Jun 14, 2024
Auxiliary request during appeals procedure - 03
Jun 14, 2024
Auxiliary request during appeals procedure - 04
Jun 14, 2024
Auxiliary request during appeals procedure - 05
Jun 14, 2024
Auxiliary request during appeals procedure - 06
Jun 14, 2024
Auxiliary request during appeals procedure - 07
Jun 14, 2024
Auxiliary request during appeals procedure - 08
Jun 14, 2024
Auxiliary request during appeals procedure - 09
Jun 14, 2024
F3345 Forwarding of submissions to parties
Jun 14, 2024
Letter accompanying subsequently filed items
Jun 14, 2024
Letter dealing with oral proceedings during the appeal procedure
Jun 14, 2024
Main request during appeals procedure
Jun 10, 2024
F3345 Forwarding of submissions to parties
Jun 7, 2024
F3345 Forwarding of submissions to parties
Jun 5, 2024
(Electronic) Receipt
Jun 5, 2024
Letter accompanying subsequently filed items
Jun 5, 2024
Request for interpreters during oral proceedings
Jun 4, 2024
(Electronic) Receipt
Jun 4, 2024
Letter accompanying subsequently filed items
Jun 4, 2024
Request for interpreters during oral proceedings
Mar 18, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Mar 18, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Aug 5, 2023
F3011.2 Oral Proceedings: Summons VICO
Aug 4, 2023
F3011.2 Oral Proceedings: Summons VICO
Aug 2, 2023
F3010 Oral proceedings: order for summons
Aug 2, 2023
F3303.16 Change of composition of the Board (T)
Jul 26, 2023
F3056 Communication: Change of Board due to the technical nature of the appeal
Jul 26, 2023
F3056 Communication: Change of Board due to the technical nature of the appeal
Jul 26, 2023
F3303.16 Change of composition of the Board (T)
Jul 25, 2023
F3004 Communication of the Registry
Jul 25, 2023
F3004 Communication of the Registry
Jul 24, 2023
F3057 Communication: Change of responsibility of a Board of Appeal
Jul 24, 2023
F3057 Communication: Change of responsibility of a Board of Appeal
Jul 24, 2023
F3313 Order: change of Board due to the technical aspects of the appeal
Jul 4, 2023
Composition of the board (T)
Mar 13, 2023
F3057 Communication: Change of responsibility of a Board of Appeal
Mar 13, 2023
F3057 Communication: Change of responsibility of a Board of Appeal
Oct 28, 2022
F3345 Forwarding of submissions to parties
Oct 25, 2022
(Electronic) Receipt
Oct 25, 2022
Amended claims with annotations
Oct 25, 2022
Claims
Oct 25, 2022
Letter accompanying subsequently filed items
Oct 25, 2022
Reply to appeal
Jun 15, 2022
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Jun 10, 2022
(Electronic) Receipt
Jun 10, 2022
Annexes (other than cited documents) regarding appeal procedure
Jun 10, 2022
Letter accompanying subsequently filed items
Jun 10, 2022
Statement of grounds of appeal
Apr 12, 2022
(Electronic) Receipt
Apr 12, 2022
Letter accompanying subsequently filed items
Apr 6, 2022
(Electronic) Receipt
Apr 6, 2022
Letter accompanying subsequently filed items
Apr 6, 2022
Letter relating to Appeal Procedure
Apr 5, 2022
F3204 Communication of the file number to the parties
Apr 5, 2022
F3204 Communication of the file number to the parties
Mar 30, 2022
(Electronic) Receipt
Mar 30, 2022
Letter accompanying subsequently filed items
Mar 30, 2022
Notice of appeal
Feb 1, 2022
Advice of delivery
Jan 31, 2022
(Electronic) Receipt
Jan 31, 2022
Advice of delivery
Jan 31, 2022
Annex to a communication
Jan 31, 2022
Annex to the communication - opposition
Jan 31, 2022
Decision of the Opposition Division and instruction
Jan 31, 2022
Decision rejecting the opposition
Jan 31, 2022
Decision rejecting the opposition
Jan 31, 2022
Grounds for the decision (Annex) - opposition
Jan 31, 2022
Letter accompanying subsequently filed items
Jan 31, 2022
Means of redress
Jan 31, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jan 31, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jan 31, 2022
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Jan 31, 2022
Provision of a copy of the minutes - opposition procedure
Jan 31, 2022
Provision of a copy of the minutes - opposition procedure
Jan 31, 2022
Transmittal of decision / summons - opposition
Jan 31, 2022
Transmittal of decision / summons - opposition
Nov 11, 2021
Information about the result of oral proceedings
Oct 20, 2021
Brief communication - Opposition proceedings
Oct 20, 2021
Brief communication - Opposition proceedings
Sep 17, 2021
Brief communication - Opposition proceedings
Sep 17, 2021
Brief communication - Opposition proceedings
Sep 10, 2021
(Electronic) Receipt
Sep 10, 2021
(Electronic) Receipt
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure
Sep 10, 2021
Auxiliary request during Opposition procedure - 24
Sep 10, 2021
Auxiliary request during Opposition procedure - 25
Sep 10, 2021
Auxiliary request during Opposition procedure - 26
Sep 10, 2021
Auxiliary request during Opposition procedure - 27
Sep 10, 2021
Auxiliary request during Opposition procedure - 28
Sep 10, 2021
Auxiliary request during Opposition procedure - 29
Sep 10, 2021
Auxiliary request during Opposition procedure - 30
Sep 10, 2021
Auxiliary request during Opposition procedure - 31
Sep 10, 2021
Auxiliary request during Opposition procedure - 32
Sep 10, 2021
Auxiliary request during Opposition procedure - 33
Sep 10, 2021
Auxiliary request during Opposition procedure - 34
Sep 10, 2021
Auxiliary request during Opposition procedure - 35
Sep 10, 2021
Citation in opposition procedure - 016
Sep 10, 2021
Citation in opposition procedure - 016
Sep 10, 2021
Letter accompanying subsequently filed items
Sep 10, 2021
Letter accompanying subsequently filed items
Sep 10, 2021
Written submission in preparation to/during oral proceedings
Sep 10, 2021
Written submission in preparation to/during oral proceedings
Jun 8, 2021
Advice of delivery
Jun 4, 2021
Advice of delivery
Jun 1, 2021
Summons to attend oral proceedings
Jun 1, 2021
Summons to attend oral proceedings
Jun 1, 2021
Transmittal of decision / summons - opposition
Jun 1, 2021
Transmittal of decision / summons - opposition
May 28, 2021
Advice of delivery
May 27, 2021
Notification concerning the date of oral proceedings
May 27, 2021
Notification concerning the date of oral proceedings
May 25, 2021
Annex to the communication - opposition
May 25, 2021
Brief communication - Opposition proceedings
May 17, 2021
(Electronic) Receipt
May 17, 2021
Letter accompanying subsequently filed items
May 17, 2021
Oral proceedings: Request for postponement
Apr 19, 2021
Brief communication - Opposition proceedings
Apr 14, 2021
Brief communication - Opposition proceedings
Apr 9, 2021
(Electronic) Receipt
Apr 9, 2021
(Electronic) Receipt
Apr 9, 2021
Citation in opposition procedure - 007
Apr 9, 2021
Citation in opposition procedure - 008
Apr 9, 2021
Citation in opposition procedure - 009
Apr 9, 2021
Citation in opposition procedure - 010
Apr 9, 2021
Citation in opposition procedure - 011
Apr 9, 2021
Citation in opposition procedure - 012
Apr 9, 2021
Citation in opposition procedure - 013
Apr 9, 2021
Citation in opposition procedure - 014
Apr 9, 2021
Citation in opposition procedure - 015
Apr 9, 2021
Consolidated list of cited opposition documents
Apr 9, 2021
Letter accompanying subsequently filed items
Apr 9, 2021
Letter accompanying subsequently filed items
Apr 9, 2021
Request for interpreters during oral proceedings
Apr 9, 2021
Written submission in preparation to/during oral proceedings
Apr 8, 2021
(Electronic) Receipt
Apr 8, 2021
Letter accompanying subsequently filed items
Apr 8, 2021
Request for interpreters during oral proceedings
Mar 11, 2021
(Electronic) Receipt
Mar 11, 2021
Letter accompanying subsequently filed items
Mar 4, 2021
Letter accompanying subsequently filed items
Mar 3, 2021
Notification concerning the date of oral proceedings
Mar 3, 2021
Notification concerning the date of oral proceedings
Sep 1, 2020
Advice of delivery
Sep 1, 2020
Advice of delivery
Aug 27, 2020
Acknowledgement of a document
Aug 27, 2020
Acknowledgement of a document
Aug 27, 2020
Annex to the communication - opposition
Aug 27, 2020
Information concerning oral proceedings
Aug 27, 2020
Summons to attend oral proceedings
Aug 27, 2020
Summons to attend oral proceedings
Jun 2, 2020
Brief communication - Opposition proceedings
May 25, 2020
(Electronic) Receipt
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure
May 25, 2020
Auxiliary request during Opposition procedure - 01
May 25, 2020
Auxiliary request during Opposition procedure - 02
May 25, 2020
Auxiliary request during Opposition procedure - 03
May 25, 2020
Auxiliary request during Opposition procedure - 04
May 25, 2020
Auxiliary request during Opposition procedure - 05
May 25, 2020
Auxiliary request during Opposition procedure - 06
May 25, 2020
Auxiliary request during Opposition procedure - 07
May 25, 2020
Auxiliary request during Opposition procedure - 08
May 25, 2020
Auxiliary request during Opposition procedure - 09
May 25, 2020
Auxiliary request during Opposition procedure - 10
May 25, 2020
Auxiliary request during Opposition procedure - 11
May 25, 2020
Auxiliary request during Opposition procedure - 12
May 25, 2020
Auxiliary request during Opposition procedure - 13
May 25, 2020
Auxiliary request during Opposition procedure - 14
May 25, 2020
Auxiliary request during Opposition procedure - 15
May 25, 2020
Auxiliary request during Opposition procedure - 16
May 25, 2020
Auxiliary request during Opposition procedure - 17
May 25, 2020
Auxiliary request during Opposition procedure - 18
May 25, 2020
Auxiliary request during Opposition procedure - 19
May 25, 2020
Auxiliary request during Opposition procedure - 20
May 25, 2020
Auxiliary request during Opposition procedure - 21
May 25, 2020
Auxiliary request during Opposition procedure - 22
May 25, 2020
Auxiliary request during Opposition procedure - 23
May 25, 2020
Citation in opposition procedure - 006
May 25, 2020
Letter accompanying subsequently filed items
May 25, 2020
Main request during Opposition procedure
May 25, 2020
Main request during Opposition procedure
May 25, 2020
Reply of the patent proprietor to the notice(s) of opposition
Jan 27, 2020
Brief communication - Opposition proceedings
Jan 24, 2020
Communication of a notice of opposition and request to file observations
Jan 24, 2020
Notice of further oppositions to opponent(s)
Jan 22, 2020
(Electronic) Receipt
Jan 22, 2020
(Electronic) Receipt
Jan 22, 2020
Letter accompanying subsequently filed items
Jan 22, 2020
Letter accompanying subsequently filed items
Jan 22, 2020
Letter regarding the opposition procedure (no time limit)
Jan 22, 2020
Letter regarding the opposition procedure (no time limit)
Jan 17, 2020
Communication of a notice of opposition - first information to patent proprietor
Jan 10, 2020
(Electronic) Receipt
Jan 10, 2020
Any annexes (other than citation) to an opposition letter
Jan 10, 2020
Any annexes (other than citation) to an opposition letter
Jan 10, 2020
Any annexes (other than citation) to an opposition letter
Jan 10, 2020
Citation in opposition procedure - 001
Jan 10, 2020
Citation in opposition procedure - 002
Jan 10, 2020
Citation in opposition procedure - 003
Jan 10, 2020
Citation in opposition procedure - 004
Jan 10, 2020
Citation in opposition procedure - 005
Jan 10, 2020
Notice of opposition
Jan 10, 2020
Notice of opposition
Apr 24, 2019
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Mar 14, 2019
Decision to grant a European patent
Feb 25, 2019
(Electronic) Receipt
Feb 25, 2019
Filing of the translations of the claims
Feb 25, 2019
French translation of claims
Feb 25, 2019
German translation of the claims
Feb 25, 2019
Letter accompanying subsequently filed items
Nov 26, 2018
Bibliographic data of the European patent application
Nov 26, 2018
Communication about intention to grant a European patent
Nov 26, 2018
Intention to grant (signatures)
Nov 26, 2018
Text intended for grant (clean copy)
Nov 26, 2018
Text intended for grant (version for approval)
Nov 2, 2018
Examination started
Dec 8, 2017
(Electronic) Receipt
Dec 8, 2017
Amended claims filed after receipt of (European) search report
Dec 8, 2017
Amendments received before examination
Dec 8, 2017
Letter accompanying subsequently filed items
Jun 12, 2017
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
May 24, 2017
Communication regarding the transmission of the European search report
May 24, 2017
European search opinion
May 24, 2017
Information on Search Strategy
May 24, 2017
Supplementary European search report
May 10, 2017
Search started
Aug 10, 2016
Notification of forthcoming publication
Jul 4, 2016
Communication to designated inventor
Jul 4, 2016
Communication to designated inventor
Jul 4, 2016
Communication to designated inventor
Jul 4, 2016
Communication to designated inventor
Jul 4, 2016
Communication to designated inventor
Jul 4, 2016
Communication to designated inventor
Jul 4, 2016
Communication to designated inventor
Jun 28, 2016
Communication regarding possible amendment of the application/payment of claims fee
Jun 3, 2016
(Electronic) Receipt
Jun 3, 2016
Abstract
Jun 3, 2016
Amended claims filed after receipt of (European) search report
Jun 3, 2016
Claims
Jun 3, 2016
Copy of the international preliminary report on patentability
Jun 3, 2016
Description
Jun 3, 2016
Drawings
Jun 3, 2016
Request for entry into the European phase
Jun 3, 2016
Translation of the international preliminary report on patentability
Apr 8, 2016
Information on entry into European phase
Apr 5, 2016
Notification of the recording of a change
Jun 23, 2015
Priority document (electronically transmitted)
Jun 4, 2015
Copy of the international search report
Jun 4, 2015
Copy of the translated international search report
Jun 4, 2015
International publication pamphlet

EP3065209

ASAHI KASEI KABUSHIKI KAISHA

Application Number: EP14865899A
Filing Date: Dec 1, 2014
Status: Patent Maintained As Amended; Oct 3, 2025
Publication Date: Nov 5, 2025
External Links: Slate, Register , Google Patents

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Polymer Electrolyte Film

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Dossier Documents

EP3065209