IP Verse

Method For Producing A Piston For A Combustion Engine From A Piston Upper Part And A Piston Lower Part

Patent No. EP3421770 (titled "Method For Producing A Piston For A Combustion Engine From A Piston Upper Part And A Piston Lower Part") was filed by Mahle on Jun 13, 2018. The application was issued on Aug 5, 2020.

Patent Summary

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Patent Oppositions

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
FEDERAL MOGUL NURNBERG	May 5, 2021	HOFFMANN EITLE

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 1, 2025
Refund of fees
Sep 30, 2025
F3013 Oral Proceedings: Forwarding minutes
Sep 30, 2025
F3013 Oral Proceedings: Forwarding minutes
Sep 30, 2025
F3315 Oral Proceedings: Minutes (Appellant : Proprietor)
Sep 30, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Sep 30, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Aug 26, 2025
F3345 Forwarding of submissions to parties
Aug 21, 2025
(Electronic) Receipt
Aug 21, 2025
Letter accompanying subsequently filed items
Aug 21, 2025
Letter accompanying subsequently filed items
Aug 21, 2025
Request for interpreters during oral proceedings
Jul 23, 2025
F3345 Forwarding of submissions to parties
Jul 18, 2025
(Electronic) Receipt
Jul 18, 2025
Letter accompanying subsequently filed items
Jul 18, 2025
Letter dealing with oral proceedings during the appeal procedure
Jun 5, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jun 5, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Dec 18, 2024
F3011.2 Oral Proceedings: Summons VICO
Dec 18, 2024
F3011.2 Oral Proceedings: Summons VICO
Dec 18, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Dec 18, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Dec 13, 2024
F3010 Oral proceedings: order for summons
Jul 22, 2024
Composition of the board (T)
Jul 11, 2023
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Jul 6, 2023
(Electronic) Receipt
Jul 6, 2023
Amended claims with annotations
Jul 6, 2023
Letter accompanying subsequently filed items
Jul 6, 2023
Main request during appeals procedure
Jul 6, 2023
Statement of grounds of appeal
May 10, 2023
F3345 Forwarding of submissions to parties
May 5, 2023
(Electronic) Receipt
May 5, 2023
Letter accompanying subsequently filed items
May 5, 2023
Letter relating to Appeal Procedure
May 2, 2023
F3204 Communication of the file number to the parties
May 2, 2023
F3204 Communication of the file number to the parties
Apr 21, 2023
(Electronic) Receipt
Apr 21, 2023
Letter accompanying subsequently filed items
Apr 21, 2023
Notice of appeal
Feb 28, 2023
Advice of delivery
Feb 28, 2023
Annex to the communication - opposition
Feb 28, 2023
Decision of the Opposition Division and instruction
Feb 28, 2023
Decision revoking the European patent
Feb 28, 2023
Decision revoking the European patent
Feb 28, 2023
Grounds for the decision (Annex) - opposition
Feb 28, 2023
Means of redress
Feb 28, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Feb 28, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Feb 28, 2023
Provision of a copy of the minutes - opposition procedure
Feb 28, 2023
Provision of a copy of the minutes - opposition procedure
Feb 28, 2023
Scanned annex to a communication - opposition procedure
Feb 28, 2023
Transmittal of decision / summons - opposition
Feb 28, 2023
Transmittal of decision / summons - opposition
Sep 30, 2022
Information about the result of oral proceedings
Aug 5, 2022
Brief communication - Opposition proceedings
Aug 4, 2022
Brief communication - Opposition proceedings
Jul 29, 2022
(Electronic) Receipt
Jul 29, 2022
Letter accompanying subsequently filed items
Jul 29, 2022
Request for interpreters during oral proceedings
Jul 28, 2022
(Electronic) Receipt
Jul 28, 2022
Letter accompanying subsequently filed items
Jul 28, 2022
Written submission in preparation to/during oral proceedings
Jul 4, 2022
Brief communication - Opposition proceedings
Jun 27, 2022
(Electronic) Receipt
Jun 27, 2022
(Electronic) Receipt
Jun 27, 2022
Letter accompanying subsequently filed items
Jun 27, 2022
Letter accompanying subsequently filed items
Jun 27, 2022
Request for interpreters during oral proceedings
Apr 21, 2022
Notification concerning the date of oral proceedings
Apr 21, 2022
Notification concerning the date of oral proceedings
Jan 28, 2022
Advice of delivery
Jan 20, 2022
Advice of delivery
Jan 19, 2022
Annex to the communication - opposition
Oct 11, 2021
Brief communication - Opposition proceedings
Oct 1, 2021
(Electronic) Receipt
Oct 1, 2021
Auxiliary request during Opposition procedure
Oct 1, 2021
Auxiliary request during Opposition procedure - 01
Oct 1, 2021
Letter accompanying subsequently filed items
Oct 1, 2021
Reply of the patent proprietor to the notice(s) of opposition
May 21, 2021
Communication of a notice of opposition and request to file observations
May 21, 2021
Notice of further oppositions to opponent(s)
May 14, 2021
Communication of a notice of opposition - first information to patent proprietor
May 5, 2021
(Electronic) Receipt
May 5, 2021
Citation in opposition procedure - 001
May 5, 2021
Consolidated list of cited opposition documents
May 5, 2021
Notice of opposition
May 5, 2021
Notice of opposition
Aug 17, 2020
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jul 9, 2020
Decision to grant a European patent
Jun 19, 2020
(Electronic) Receipt
Jun 19, 2020
English translation of the claims
Jun 19, 2020
Filing of the translations of the claims
Jun 19, 2020
French translation of claims
Jun 19, 2020
Letter accompanying subsequently filed items
Feb 25, 2020
Bibliographic data of the European patent application
Feb 25, 2020
Communication about intention to grant a European patent
Feb 25, 2020
Intention to grant (signatures)
Feb 25, 2020
Text intended for grant (clean copy)
Feb 25, 2020
Text intended for grant (version for approval)
Jan 13, 2020
Examination started
Jul 1, 2019
(Electronic) Receipt
Jul 1, 2019
Letter accompanying subsequently filed items
Jul 1, 2019
Reply to Written Opinion prepared by the EPO
Jan 7, 2019
Reminder period for payment of examination fee/designation fee and correction of deficiencies in Written Opinion/amendment
Dec 5, 2018
Notification of forthcoming publication
Nov 29, 2018
Communication regarding the transmission of the European search report
Nov 29, 2018
Document annexed to the Extended European Search Report
Nov 29, 2018
European search opinion
Nov 29, 2018
European search report
Nov 29, 2018
Information on Search Strategy
Nov 20, 2018
Search started
Aug 6, 2018
Communication to designated inventor
Aug 6, 2018
Letter concerning the priority
Aug 6, 2018
Priority document
Jun 13, 2018
Abstract
Jun 13, 2018
Acknowledgement of receipt of electronic submission of the request for grant of a European patent
Jun 13, 2018
Claims
Jun 13, 2018
Description
Jun 13, 2018
Designation of inventor
Jun 13, 2018
Drawings
Jun 13, 2018
Priority search results
Jun 13, 2018
Request for grant of a European patent

EP3421770

MAHLE

Application Number: EP18177575A
Filing Date: Jun 13, 2018
Status: Revoked; Oct 3, 2025
Publication Date: Aug 5, 2020
External Links: Slate, Register , Google Patents