Heat Sensitive Recording Material

Patent No. EP3221153 (titled "Heat Sensitive Recording Material") was filed by Mitsubishi Hitec Paper Europe on Jun 24, 2016. The application was issued on Apr 29, 2026.

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
PAPIERFABRIK AUGUST KOEHLER	May 13, 2019	HELD
KOEHLER OBERKIRCH	May 13, 2019	MEISSNER BOLTE PARTNERSCHAFT MBB

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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Apr 2, 2026
Decision to maintain the European patent in amended form
Apr 2, 2026
Decision to maintain the European patent in amended form
Mar 20, 2026
(Electronic) Receipt
Mar 20, 2026
English translation of the claims
Mar 20, 2026
Filing of the translation of the amended claims
Mar 20, 2026
French translation of claims
Mar 20, 2026
Letter accompanying subsequently filed items
Jan 15, 2026
Communication of bibliographic data
Jan 15, 2026
Communication to opponent concerning maintenance
Jan 15, 2026
Communication with request to file translations
Jan 12, 2026
Maintenance of the patent with the documents specified in the final decision
Oct 8, 2025
Annex to the communication - opposition
Oct 8, 2025
Brief communication - Opposition proceedings
Oct 8, 2025
Brief communication - Opposition proceedings
Oct 8, 2025
Decision of the Opposition Division and instruction
Oct 8, 2025
Druckexemplar in opposition procedure
Oct 8, 2025
Grounds for the decision (Annex) - opposition
Oct 8, 2025
Interlocutory decision in opposition proceedings
Oct 8, 2025
Interlocutory decision in opposition proceedings
Oct 8, 2025
Means of redress
Oct 8, 2025
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Oct 8, 2025
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Oct 8, 2025
Provision of a copy of the minutes - opposition procedure
Oct 8, 2025
Provision of a copy of the minutes - opposition procedure
Oct 8, 2025
Scanned annex to a communication - opposition procedure
Oct 8, 2025
Scanned annex to a communication - opposition procedure
Oct 8, 2025
Scanned annex to a communication - opposition procedure
Sep 5, 2025
Brief communication - Opposition proceedings
Sep 3, 2025
Information about the result of oral proceedings
Sep 2, 2025
(Electronic) Receipt
Sep 2, 2025
Amended description with annotations
Sep 2, 2025
Auxiliary request during Opposition procedure
Sep 2, 2025
Auxiliary request during Opposition procedure - 01
Sep 2, 2025
Brief communication - Opposition proceedings
Sep 2, 2025
Citation in opposition procedure - 033
Sep 2, 2025
Description
Sep 2, 2025
Letter accompanying subsequently filed items
Sep 2, 2025
Written submission in preparation to/during oral proceedings
Aug 29, 2025
(Electronic) Receipt
Aug 29, 2025
Citation in opposition procedure - 030
Aug 29, 2025
Citation in opposition procedure - 031
Aug 29, 2025
Citation in opposition procedure - 032
Aug 29, 2025
Letter accompanying subsequently filed items
Aug 29, 2025
Written submission in preparation to/during oral proceedings
Jul 31, 2025
(Electronic) Receipt
Jul 31, 2025
Letter accompanying subsequently filed items
Jul 9, 2025
Brief communication - Opposition proceedings
Jul 9, 2025
Brief communication - Opposition proceedings
Jul 8, 2025
Brief communication - Opposition proceedings
Jul 3, 2025
(Electronic) Receipt
Jul 3, 2025
(Electronic) Receipt
Jul 3, 2025
Amended description with annotations
Jul 3, 2025
Amended description with annotations
Jul 3, 2025
Amended description with annotations
Jul 3, 2025
Amended description with annotations
Jul 3, 2025
Amended description with annotations
Jul 3, 2025
Auxiliary request during Opposition procedure
Jul 3, 2025
Auxiliary request during Opposition procedure - 06
Jul 3, 2025
Citation in opposition procedure - 028
Jul 3, 2025
Citation in opposition procedure - 029
Jul 3, 2025
Description
Jul 3, 2025
Description
Jul 3, 2025
Description
Jul 3, 2025
Description
Jul 3, 2025
Description
Jul 3, 2025
Letter accompanying subsequently filed items
Jul 3, 2025
Letter accompanying subsequently filed items
Jul 3, 2025
Request for interpreters during oral proceedings
Jul 3, 2025
Written submission in preparation to/during oral proceedings
Jul 2, 2025
(Electronic) Receipt
Jul 2, 2025
Letter accompanying subsequently filed items
Jul 2, 2025
Written submission in preparation to/during oral proceedings
Jun 20, 2025
Brief communication - Opposition proceedings
Jun 16, 2025
(Electronic) Receipt
Jun 16, 2025
Letter accompanying subsequently filed items
Jun 16, 2025
Request for interpreters during oral proceedings
Feb 10, 2025
Annex to the communication - opposition
Feb 10, 2025
Information concerning oral proceedings
Jan 28, 2025
Annex to the communication - opposition
Jan 28, 2025
Information concerning oral proceedings
Jan 28, 2025
Summons to attend oral proceedings
Jan 28, 2025
Summons to attend oral proceedings
Jan 16, 2025
Notification concerning the date of oral proceedings
Jan 16, 2025
Notification concerning the date of oral proceedings
Jan 15, 2025
Brief communication - Opposition proceedings
Jan 9, 2025
(Electronic) Receipt
Jan 9, 2025
Any annexes (other than citation) to an opposition letter
Jan 9, 2025
Letter accompanying subsequently filed items
Jan 9, 2025
Oral proceedings: Request for postponement
Jan 2, 2025
Annex to the communication - opposition
Jan 2, 2025
Information concerning oral proceedings
Aug 23, 2024
Decision of the Board of Appeal
Aug 23, 2024
F3032 Notification(s) of the decision
Aug 23, 2024
F3032 Notification(s) of the decision
Mar 8, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Mar 8, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Dec 11, 2023
Cited document during appeal procedure
Dec 11, 2023
Cited document during appeal procedure
Dec 11, 2023
Cited document during appeal procedure
Dec 11, 2023
Cited document during appeal procedure
Dec 11, 2023
F3013 Oral Proceedings: Forwarding minutes
Dec 11, 2023
F3013 Oral Proceedings: Forwarding minutes
Dec 11, 2023
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Nov 28, 2023
F3345 Forwarding of submissions to parties
Nov 24, 2023
(Electronic) Receipt
Nov 24, 2023
Amended claims with annotations
Nov 24, 2023
Amended claims with annotations
Nov 24, 2023
Amended claims with annotations
Nov 24, 2023
Amended claims with annotations
Nov 24, 2023
Auxiliary request during appeals procedure - 01
Nov 24, 2023
Auxiliary request during appeals procedure - 02
Nov 24, 2023
Auxiliary request during appeals procedure - 03
Nov 24, 2023
Auxiliary request during appeals procedure - 04
Nov 24, 2023
Letter accompanying subsequently filed items
Nov 24, 2023
Letter dealing with oral proceedings during the appeal procedure
Nov 23, 2023
F3345 Forwarding of submissions to parties
Nov 22, 2023
(Electronic) Receipt
Nov 22, 2023
Letter accompanying subsequently filed items
Nov 22, 2023
Letter dealing with oral proceedings during the appeal procedure
Nov 22, 2023
Non-Patent Literature cited during the appeal procedure
Nov 21, 2023
F3345 Forwarding of submissions to parties
Nov 16, 2023
(Electronic) Receipt
Nov 16, 2023
Letter accompanying subsequently filed items
Nov 16, 2023
Letter dealing with oral proceedings during the appeal procedure
Nov 15, 2023
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Nov 15, 2023
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Nov 6, 2023
(Electronic) Receipt
Nov 6, 2023
F3345 Forwarding of submissions to parties
Nov 6, 2023
Letter accompanying subsequently filed items
Nov 6, 2023
Letter dealing with oral proceedings during the appeal procedure
Oct 12, 2023
F3345 Forwarding of submissions to parties
Oct 10, 2023
(Electronic) Receipt
Oct 10, 2023
Letter accompanying subsequently filed items
Oct 10, 2023
Letter dealing with oral proceedings during the appeal procedure
May 9, 2023
F3345 Forwarding of submissions to parties
May 3, 2023
(Electronic) Receipt
May 3, 2023
Letter accompanying subsequently filed items
May 3, 2023
Letter relating to Appeal Procedure
Mar 20, 2023
Letter accompanying subsequently filed items
Mar 20, 2023
Request for change of opponent's representative
Mar 13, 2023
F3345 Forwarding of submissions to parties
Mar 2, 2023
(Electronic) Receipt
Mar 2, 2023
Letter accompanying subsequently filed items
Mar 2, 2023
Letter relating to Appeal Procedure
Jan 4, 2023
F3345 Forwarding of submissions to parties
Dec 23, 2022
(Electronic) Receipt
Dec 23, 2022
Letter accompanying subsequently filed items
Dec 23, 2022
Letter relating to Appeal Procedure
Aug 19, 2022
F3345 Forwarding of submissions to parties
Aug 15, 2022
(Electronic) Receipt
Aug 15, 2022
Letter accompanying subsequently filed items
Aug 15, 2022
Letter dealing with oral proceedings during the appeal procedure
Aug 9, 2022
Standard Communication Rule 103 (2) EPC
Aug 9, 2022
Standard Communication Rule 103 (2) EPC
Aug 5, 2022
F3011.1 Oral Proceedings: summons
Aug 5, 2022
F3011.1 Oral Proceedings: summons
Aug 2, 2022
Cited document during appeal procedure
Jul 4, 2022
F3010 Oral proceedings: order for summons
Apr 21, 2022
F3345 Forwarding of submissions to parties
Apr 14, 2022
(Electronic) Receipt
Apr 14, 2022
Letter accompanying subsequently filed items
Apr 14, 2022
Letter relating to Appeal Procedure
Apr 14, 2022
Non-Patent Literature cited during the appeal procedure
Apr 14, 2022
Patent Document cited during the appeal procedure
Feb 11, 2022
Communication of amended entries in the Register of European Patents
Feb 11, 2022
F3345 Forwarding of submissions to parties
Feb 4, 2022
Composition of the board (T)
Feb 3, 2022
(Electronic) Receipt
Feb 3, 2022
Annexes in respect of a client data request
Feb 3, 2022
Letter accompanying subsequently filed items
Feb 3, 2022
Request for change of name -opponent
Jan 4, 2022
F3345 Forwarding of submissions to parties
Dec 21, 2021
(Electronic) Receipt
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Amended claims with annotations
Dec 21, 2021
Auxiliary request during appeals procedure - 01
Dec 21, 2021
Auxiliary request during appeals procedure - 02
Dec 21, 2021
Auxiliary request during appeals procedure - 03
Dec 21, 2021
Auxiliary request during appeals procedure - 04
Dec 21, 2021
Auxiliary request during appeals procedure - 05
Dec 21, 2021
Auxiliary request during appeals procedure - 06
Dec 21, 2021
Auxiliary request during appeals procedure - 07
Dec 21, 2021
Auxiliary request during appeals procedure - 08
Dec 21, 2021
Auxiliary request during appeals procedure - 09
Dec 21, 2021
Auxiliary request during appeals procedure - 10
Dec 21, 2021
Auxiliary request during appeals procedure - 11
Dec 21, 2021
Letter accompanying subsequently filed items
Dec 21, 2021
Reply to appeal
Aug 16, 2021
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Aug 11, 2021
(Electronic) Receipt
Aug 11, 2021
Letter accompanying subsequently filed items
Aug 11, 2021
Non-Patent Literature cited during the appeal procedure
Aug 11, 2021
Patent Document cited during the appeal procedure
Aug 11, 2021
Statement of grounds of appeal
Jul 16, 2021
Reply to a deficiency communication regarding an appeal
Jul 15, 2021
F3345 Forwarding of submissions to parties
Jul 12, 2021
Reply to a deficiency communication regarding an appeal
Jul 8, 2021
Advice of delivery
Jul 6, 2021
F3045 Inadmissibility of the appeal: missing address / missing name
Jul 6, 2021
F3204 Communication of the file number to the parties
Jul 6, 2021
F3204 Communication of the file number to the parties
Jun 23, 2021
(Electronic) Receipt
Jun 23, 2021
Letter accompanying subsequently filed items
Jun 23, 2021
Notice of appeal
May 20, 2021
Advice of delivery
May 20, 2021
Communication about missing advice of delivery
Apr 19, 2021
Advice of delivery
Apr 13, 2021
Annex to the communication - opposition
Apr 13, 2021
Decision of the Opposition Division and instruction
Apr 13, 2021
Decision rejecting the opposition
Apr 13, 2021
Grounds for the decision (Annex) - opposition
Apr 13, 2021
Internal form - Opposition/addressees
Apr 13, 2021
Internal form - Opposition/addressees
Apr 13, 2021
Means of redress
Apr 13, 2021
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Apr 13, 2021
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Apr 13, 2021
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Apr 13, 2021
Provision of a copy of the minutes - opposition procedure
Apr 13, 2021
Scanned annex to a communication - opposition procedure
Apr 13, 2021
Transmittal of decision / summons - opposition
Apr 13, 2021
Transmittal of decision / summons - opposition
Feb 11, 2021
Brief communication - Opposition proceedings
Feb 11, 2021
Information about the result of oral proceedings
Feb 8, 2021
(Electronic) Receipt
Feb 8, 2021
Citation in opposition procedure - 017
Feb 8, 2021
Letter accompanying subsequently filed items
Feb 8, 2021
Written submission in preparation to/during oral proceedings
Feb 5, 2021
Brief communication - Opposition proceedings
Jan 29, 2021
(Electronic) Receipt
Jan 29, 2021
Citation in opposition procedure - 016
Jan 29, 2021
Letter accompanying subsequently filed items
Jan 29, 2021
Written submission in preparation to/during oral proceedings
Dec 16, 2020
Brief communication - Opposition proceedings
Dec 15, 2020
Brief communication - Opposition proceedings
Dec 9, 2020
(Electronic) Receipt
Dec 9, 2020
Citation in opposition procedure - 014
Dec 9, 2020
Citation in opposition procedure - 015
Dec 9, 2020
Letter accompanying subsequently filed items
Dec 9, 2020
Notification concerning the date of oral proceedings
Dec 9, 2020
Notification concerning the date of oral proceedings
Dec 9, 2020
Request for interpreters during oral proceedings
Dec 9, 2020
Written submission in preparation to/during oral proceedings
Dec 8, 2020
(Electronic) Receipt
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure
Dec 8, 2020
Auxiliary request during Opposition procedure - 01
Dec 8, 2020
Auxiliary request during Opposition procedure - 02
Dec 8, 2020
Auxiliary request during Opposition procedure - 03
Dec 8, 2020
Auxiliary request during Opposition procedure - 04
Dec 8, 2020
Auxiliary request during Opposition procedure - 05
Dec 8, 2020
Auxiliary request during Opposition procedure - 06
Dec 8, 2020
Auxiliary request during Opposition procedure - 07
Dec 8, 2020
Auxiliary request during Opposition procedure - 08
Dec 8, 2020
Letter accompanying subsequently filed items
Dec 8, 2020
Written submission in preparation to/during oral proceedings
Nov 30, 2020
Brief communication - Opposition proceedings
Nov 25, 2020
(Electronic) Receipt
Nov 25, 2020
Letter accompanying subsequently filed items
Nov 25, 2020
Written submission in preparation to/during oral proceedings
Feb 19, 2020
Advice of delivery
Feb 14, 2020
Advice of delivery
Feb 12, 2020
Annex to the communication - opposition
Feb 12, 2020
Information concerning oral proceedings
Feb 12, 2020
Summons to attend oral proceedings
Feb 12, 2020
Summons to attend oral proceedings
Oct 10, 2019
Brief communication - Opposition proceedings
Oct 7, 2019
(Electronic) Receipt
Oct 7, 2019
Citation in opposition procedure - 012
Oct 7, 2019
Letter accompanying subsequently filed items
Oct 7, 2019
Reply of the patent proprietor to the notice(s) of opposition
May 27, 2019
Communication of a notice of opposition and request to file observations
May 27, 2019
Notice of further oppositions to opponent(s)
May 17, 2019
Communication of a notice of opposition - first information to patent proprietor
May 13, 2019
(Electronic) Receipt
May 13, 2019
Citation in opposition procedure - 001
May 13, 2019
Citation in opposition procedure - 001
May 13, 2019
Citation in opposition procedure - 002
May 13, 2019
Citation in opposition procedure - 002
May 13, 2019
Citation in opposition procedure - 003
May 13, 2019
Citation in opposition procedure - 004
May 13, 2019
Citation in opposition procedure - 004
May 13, 2019
Citation in opposition procedure - 005
May 13, 2019
Citation in opposition procedure - 006
May 13, 2019
Citation in opposition procedure - 007
May 13, 2019
Citation in opposition procedure - 008
May 13, 2019
Citation in opposition procedure - 009
May 13, 2019
Citation in opposition procedure - 010
May 13, 2019
Citation in opposition procedure - 011
May 13, 2019
International publication (Pamphlet)
May 13, 2019
Notice of opposition
May 13, 2019
Notice of opposition
May 13, 2019
Patent document cited during the opposition procedure
Aug 27, 2018
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jul 19, 2018
Decision to grant a European patent
May 15, 2018
(Electronic) Receipt
May 15, 2018
English translation of the claims
May 15, 2018
Filing of the translations of the claims
May 15, 2018
French translation of claims
May 15, 2018
Letter accompanying subsequently filed items
Jan 29, 2018
Communication to designated inventor
Jan 29, 2018
Communication to designated inventor
Jan 29, 2018
Communication to designated inventor
Jan 11, 2018
Bibliographic data of the European patent application
Jan 11, 2018
Communication about intention to grant a European patent
Jan 11, 2018
Intention to grant (signatures)
Jan 11, 2018
Text intended for grant (clean copy)
Jan 11, 2018
Text intended for grant (version for approval)
Jan 8, 2018
Copy of the international preliminary report on patentability
Aug 30, 2017
Notification on forthcoming publication of bibliographic data
Jul 31, 2017
Examination started
Jun 24, 2017
Priority search results copy provided by EPO
Jun 19, 2017
(Electronic) Receipt
Jun 19, 2017
(Electronic) Receipt
Jun 19, 2017
Amended claims filed after receipt of (European) search report
Jun 19, 2017
Amended claims with annotations
Jun 19, 2017
Amendments received before examination
Jun 19, 2017
Letter concerning fees and payments
Jun 19, 2017
Matter concerning the application
Jun 19, 2017
Request for entry into the European phase
Jan 16, 2017
Priority document (electronically transmitted)
Jan 16, 2017
Priority document (electronically transmitted)
Dec 29, 2016
Copy of the international search report
Dec 29, 2016
Copy of the international search report
Dec 29, 2016
Published international application - A1
Oct 13, 2016
Written opinion of the ISA, boxes No. I to VIII
Oct 13, 2016
Written opinion of the ISA, cover sheet
Oct 13, 2016
Written opinion of the ISA, supplemental box
Jul 4, 2016
Notification of the international application number and of the international filing date
Jun 24, 2016
(Electronic) Receipt
Jun 24, 2016
Abstract
Jun 24, 2016
Claims
Jun 24, 2016
Description
Jun 24, 2016
Document concerning fees and payments
Jun 24, 2016
Drawings
Jun 24, 2016
Electronic request for grant of an International application
Jun 24, 2016
Priority document (RO-procedure)
Jun 24, 2016
Priority document (RO-procedure)

EP3221153

MITSUBISHI HITEC PAPER EUROPE

Application Number: EP16733414A
Filing Date: Jun 24, 2016
Status: Patent Maintained As Amended; Mar 27, 2026
Publication Date: Apr 29, 2026
External Links: Slate, Register , Google Patents

IP Verse

Heat Sensitive Recording Material

Patent Summary

Patent Family

Patent Oppositions (2)

Dossier Documents

EP3221153