Prechamber Spark Plug

Patent No. EP3420615 (titled "Prechamber Spark Plug") was filed by DKT Verwaltungs on Dec 18, 2017. The application was issued on Jan 13, 2021.

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
ZOLYOMI	Oct 13, 2021	SARTENA

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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Jul 11, 2025
Decision of the Board of Appeal
Jul 11, 2025
F3032 Notification(s) of the decision
Jul 11, 2025
F3032 Notification(s) of the decision
Apr 9, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Apr 9, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Apr 4, 2025
F3014 Oral Proceedings: Order cancelling/postponing
Feb 27, 2025
F3345 Forwarding of submissions to parties
Feb 24, 2025
(Electronic) Receipt
Feb 24, 2025
Letter accompanying subsequently filed items
Feb 24, 2025
Letter dealing with oral proceedings during the appeal procedure
Jan 27, 2025
F3004 Communication of the Registry
Jan 27, 2025
F3004 Communication of the Registry
Jan 20, 2025
F3345 Forwarding of submissions to parties
Jan 15, 2025
Letter dealing with oral proceedings during the appeal procedure
Jan 2, 2025
F3345 Forwarding of submissions to parties
Dec 19, 2024
Letter dealing with oral proceedings during the appeal procedure
Dec 5, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Dec 5, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jul 17, 2024
F3345 Forwarding of submissions to parties
Jul 12, 2024
(Electronic) Receipt
Jul 12, 2024
Letter accompanying subsequently filed items
Jul 12, 2024
Letter dealing with oral proceedings during the appeal procedure
Jul 10, 2024
F3345 Forwarding of submissions to parties
Jul 5, 2024
Request for interpreters during oral proceedings
Jul 2, 2024
F3011.1 Oral Proceedings: summons
Jul 2, 2024
F3011.1 Oral Proceedings: summons
Jun 27, 2024
F3010 Oral proceedings: order for summons
Jun 25, 2024
F3303.16 Change of composition of the Board (T)
Jun 12, 2024
F3056 Communication: Change of Board due to the technical nature of the appeal
Jun 12, 2024
F3056 Communication: Change of Board due to the technical nature of the appeal
Dec 19, 2023
F3345 Forwarding of submissions to parties
Dec 13, 2023
Request for change of opponent's representative
Nov 21, 2023
Composition of the board (T)
Sep 26, 2023
F3345 Forwarding of submissions to parties
Sep 20, 2023
Patent Document cited during the appeal procedure
Sep 20, 2023
Patent Document cited during the appeal procedure
Sep 20, 2023
Patent Document cited during the appeal procedure
Sep 20, 2023
Patent Document cited during the appeal procedure
Sep 20, 2023
Reply to appeal
May 31, 2023
F3345 Forwarding of submissions to parties
May 26, 2023
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
May 24, 2023
(Electronic) Receipt
May 24, 2023
Letter accompanying subsequently filed items
May 24, 2023
Letter relating to Appeal Procedure
May 23, 2023
(Electronic) Receipt
May 23, 2023
Amended claims with annotations
May 23, 2023
Amended claims with annotations
May 23, 2023
Amended claims with annotations
May 23, 2023
Amended claims with annotations
May 23, 2023
Amended claims with annotations
May 23, 2023
Auxiliary request during appeals procedure - 01
May 23, 2023
Auxiliary request during appeals procedure - 02
May 23, 2023
Auxiliary request during appeals procedure - 03
May 23, 2023
Auxiliary request during appeals procedure - 04
May 23, 2023
Auxiliary request during appeals procedure - 05
May 23, 2023
Letter accompanying subsequently filed items
May 23, 2023
Statement of grounds of appeal
Mar 24, 2023
Communication of amended entries in the Register of European Patents
Mar 24, 2023
F3345 Forwarding of submissions to parties
Mar 20, 2023
Letter relating to Appeal Procedure
Mar 9, 2023
Brief communication - Opposition proceedings
Mar 8, 2023
Advice of delivery
Feb 20, 2023
F3204 Communication of the file number to the parties
Feb 20, 2023
F3204 Communication of the file number to the parties
Feb 20, 2023
Letter which had not been notified
Feb 13, 2023
(Electronic) Receipt
Feb 13, 2023
Letter accompanying subsequently filed items
Feb 13, 2023
Notice of appeal
Jan 24, 2023
Advice of delivery
Jan 23, 2023
Annex to the communication - opposition
Jan 23, 2023
Decision of the Opposition Division and instruction
Jan 23, 2023
Decision revoking the European patent
Jan 23, 2023
Decision revoking the European patent
Jan 23, 2023
Grounds for the decision (Annex) - opposition
Jan 23, 2023
Means of redress
Jan 23, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jan 23, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Jan 23, 2023
Provision of a copy of the minutes - opposition procedure
Jan 23, 2023
Provision of a copy of the minutes - opposition procedure
Jan 23, 2023
Scanned annex to a communication - opposition procedure
Jan 23, 2023
Scanned annex to a communication - opposition procedure
Jan 23, 2023
Transmittal of decision / summons - opposition
Jan 23, 2023
Transmittal of decision / summons - opposition
Dec 1, 2022
Information about the result of oral proceedings
Nov 30, 2022
Brief communication - Opposition proceedings
Nov 23, 2022
Written submission in preparation to/during oral proceedings
Nov 22, 2022
Brief communication - Opposition proceedings
Nov 22, 2022
Written submission in preparation to/during oral proceedings
Nov 11, 2022
(Electronic) Receipt
Nov 11, 2022
Letter accompanying subsequently filed items
Nov 11, 2022
Request for interpreters during oral proceedings
Nov 8, 2022
Letter which had not been notified
Oct 28, 2022
Brief communication - Opposition proceedings
Oct 21, 2022
(Electronic) Receipt
Oct 21, 2022
Letter accompanying subsequently filed items
Oct 21, 2022
Request for interpreters during oral proceedings
Oct 20, 2022
Brief communication in opposition procedure - time limit
Oct 11, 2022
Brief communication - Opposition proceedings
Oct 11, 2022
Brief communication - Opposition proceedings
Oct 6, 2022
Brief communication - Opposition proceedings
Sep 27, 2022
(Electronic) Receipt
Sep 27, 2022
Auxiliary request during Opposition procedure
Sep 27, 2022
Auxiliary request during Opposition procedure
Sep 27, 2022
Auxiliary request during Opposition procedure
Sep 27, 2022
Auxiliary request during Opposition procedure - 01
Sep 27, 2022
Auxiliary request during Opposition procedure - 02
Sep 27, 2022
Auxiliary request during Opposition procedure - 03
Sep 27, 2022
Letter accompanying subsequently filed items
Sep 27, 2022
Written submission in preparation to/during oral proceedings
Jul 25, 2022
Advice of delivery
Jul 18, 2022
Communication about missing advice of delivery
Jul 8, 2022
Letter which had not been notified
Jun 14, 2022
Communication about missing advice of delivery
May 18, 2022
Brief communication - Opposition proceedings
May 10, 2022
(Electronic) Receipt
May 10, 2022
Request for interpreters during oral proceedings
May 9, 2022
Advice of delivery
May 4, 2022
Annex to the communication - opposition
May 4, 2022
Information concerning oral proceedings
May 4, 2022
Summons to attend oral proceedings
May 4, 2022
Summons to attend oral proceedings
May 4, 2022
Transmittal of decision / summons - opposition
May 4, 2022
Transmittal of decision / summons - opposition
Dec 22, 2021
Brief communication - Opposition proceedings
Dec 17, 2021
(Electronic) Receipt
Dec 17, 2021
Auxiliary request during Opposition procedure
Dec 17, 2021
Auxiliary request during Opposition procedure - 01
Dec 17, 2021
Letter accompanying subsequently filed items
Dec 17, 2021
Reply of the patent proprietor to the notice(s) of opposition
Oct 28, 2021
Communication of a notice of opposition and request to file observations
Oct 28, 2021
Notice of further oppositions to opponent(s)
Oct 20, 2021
Communication of a notice of opposition - first information to patent proprietor
Oct 13, 2021
Citation in opposition procedure - 001
Oct 13, 2021
Citation in opposition procedure - 002
Oct 13, 2021
Citation in opposition procedure - 003
Oct 13, 2021
Citation in opposition procedure - 004
Oct 13, 2021
Citation in opposition procedure - 005
Oct 13, 2021
Citation in opposition procedure - 005
Oct 13, 2021
Citation in opposition procedure - 006
Oct 13, 2021
Citation in opposition procedure - 006
Oct 13, 2021
Consolidated list of cited opposition documents
Oct 13, 2021
Notice of opposition
Oct 13, 2021
Notice of opposition
Oct 13, 2021
Published international application - A1
Mar 18, 2021
Communication of the registration of a transfer or change of name and/or address
Mar 12, 2021
Submission concerning change of applicant's address
Jan 25, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Dec 17, 2020
Decision to grant a European patent
Dec 4, 2020
(Electronic) Receipt
Dec 4, 2020
English translation of the claims
Dec 4, 2020
Filing of the translations of the claims
Dec 4, 2020
French translation of claims
Dec 4, 2020
Letter accompanying subsequently filed items
Aug 4, 2020
Annex to the communication about intention to grant a European patent
Aug 4, 2020
Bibliographic data of the European patent application
Aug 4, 2020
Communication about intention to grant a European patent
Aug 4, 2020
Intention to grant (signatures)
Aug 4, 2020
Text intended for grant (clean copy)
Aug 4, 2020
Text intended for grant (version for approval)
Jul 6, 2020
Examination started
Oct 2, 2019
Copy of the international preliminary report on patentability
May 28, 2019
(Electronic) Receipt
May 28, 2019
Letter accompanying subsequently filed items
May 28, 2019
Priority search results
May 28, 2019
Reply to invitation to file a copy of priority search results
May 22, 2019
Invitation to file a copy of search results(priority)
Dec 5, 2018
Notification on forthcoming publication of bibliographic data
Oct 29, 2018
(Electronic) Receipt
Oct 29, 2018
Amended claims filed after receipt of (European) search report
Oct 29, 2018
Amended claims filed after receipt of (European) search report
Oct 29, 2018
Amended claims with annotations
Oct 29, 2018
Amended claims with annotations
Oct 29, 2018
Amendments received before examination
Oct 29, 2018
Letter accompanying subsequently filed items
Oct 29, 2018
Priority document (transmitted with online filing)
Oct 9, 2018
Priority document (electronically transmitted)
Oct 5, 2018
Communication concerning correction of deficiencies in written opinion/amendment of application/payment of claims fee
Oct 2, 2018
Communication to designated inventor
Oct 2, 2018
Confirmation of effective date of early entry
Sep 24, 2018
(Electronic) Receipt
Sep 24, 2018
Request for entry into the European phase
Sep 20, 2018
Copy of the international search report
Sep 20, 2018
Copy of the international search report
Sep 20, 2018
Published international application - A1
Mar 28, 2018
ISR: cited documents
Mar 28, 2018
International Search Report - copy in English for the IB
Mar 27, 2018
Written opinion of the ISA, boxes No. I to VIII
Mar 27, 2018
Written opinion of the ISA, cover sheet
Mar 27, 2018
Written opinion of the ISA, supplemental box
Mar 1, 2018
Notification of receipt of Search copy
Feb 13, 2018
Abstract
Feb 13, 2018
Claims
Feb 13, 2018
Description
Feb 13, 2018
Drawings
Feb 13, 2018
Request form for international application (copy for ISA/EP)

EP3420615

DKT VERWALTUNGS

Application Number: EP17842286A
Filing Date: Dec 18, 2017
Status: Revoked; Jul 18, 2025
Publication Date: Jan 13, 2021
External Links: Slate, Register , Google Patents

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Prechamber Spark Plug

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Dossier Documents

EP3420615