Method For Spot Welding Of Plated Steel Sheet

Patent No. EP3278917 (titled "Method For Spot Welding Of Plated Steel Sheet") was filed by Nippon Steel on Mar 30, 2016. The application was issued on Dec 16, 2020.

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
ARCELORMITTAL FRANCE	Sep 16, 2021	PLAISANT
ARCELORMITTAL	Sep 16, 2021	LAVOIX

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

EP3278917

NIPPON STEEL

Application Number: EP16773050A
Filing Date: Mar 30, 2016
Status: Granted And Under Opposition; Nov 13, 2020
Publication Date: Dec 16, 2020
External Links: Slate, Register , Google Patents

IP Verse

Method For Spot Welding Of Plated Steel Sheet

Patent Summary

Patent Family

Patent Oppositions (2)

Dossier Documents

EP3278917