Threaded Joint

Patent No. EP3514431 (titled "Threaded Joint") was filed by Nippon Steel on Sep 15, 2017. The application was issued on Sep 3, 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
HYDRIL	Jan 15, 2021	BOULT WADE TENNANT

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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Aug 7, 2025
Decision to maintain the European patent in amended form
Aug 7, 2025
Decision to maintain the European patent in amended form
Jul 28, 2025
(Electronic) Receipt
Jul 28, 2025
Filing of the translation of the amended claims
Jul 28, 2025
French translation of claims
Jul 28, 2025
German translation of the claims
Jul 28, 2025
Letter accompanying subsequently filed items
May 22, 2025
Communication to opponent concerning maintenance
May 22, 2025
Communication with request to file translations
May 6, 2025
Maintenance of the patent with the documents specified in the final decision
Apr 24, 2025
Druckexemplar in opposition procedure
Apr 11, 2025
Decision of the Board of Appeal
Apr 11, 2025
F3032 Notification(s) of the decision
Apr 11, 2025
F3032 Notification(s) of the decision
Jan 24, 2025
F3013 Oral Proceedings: Forwarding minutes
Jan 24, 2025
F3013 Oral Proceedings: Forwarding minutes
Jan 24, 2025
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Jan 15, 2025
F3345 Forwarding of submissions to parties
Jan 14, 2025
(Electronic) Receipt
Jan 14, 2025
Letter accompanying subsequently filed items
Jan 14, 2025
Letter dealing with oral proceedings during the appeal procedure
Dec 23, 2024
F3345 Forwarding of submissions to parties
Dec 20, 2024
(Electronic) Receipt
Dec 20, 2024
Letter accompanying subsequently filed items
Dec 20, 2024
Letter relating to Appeal Procedure
Dec 10, 2024
F3345 Forwarding of submissions to parties
Dec 5, 2024
(Electronic) Receipt
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Amended claims with annotations
Dec 5, 2024
Annexes (other than cited documents) regarding appeal procedure
Dec 5, 2024
Auxiliary request during appeals procedure - 30
Dec 5, 2024
Auxiliary request during appeals procedure - 31
Dec 5, 2024
Auxiliary request during appeals procedure - 32
Dec 5, 2024
Auxiliary request during appeals procedure - 33
Dec 5, 2024
Auxiliary request during appeals procedure - 34
Dec 5, 2024
Auxiliary request during appeals procedure - 35
Dec 5, 2024
Auxiliary request during appeals procedure - 36
Dec 5, 2024
Auxiliary request during appeals procedure - 37
Dec 5, 2024
Auxiliary request during appeals procedure - 38
Dec 5, 2024
Auxiliary request during appeals procedure - 39
Dec 5, 2024
Letter accompanying subsequently filed items
Dec 5, 2024
Letter dealing with oral proceedings during the appeal procedure
Nov 22, 2024
F3345 Forwarding of submissions to parties
Nov 15, 2024
(Electronic) Receipt
Nov 15, 2024
Letter accompanying subsequently filed items
Nov 13, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Nov 13, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Aug 1, 2024
F3345 Forwarding of submissions to parties
Jul 25, 2024
(Electronic) Receipt
Jul 25, 2024
Annexes (other than cited documents) regarding appeal procedure
Jul 25, 2024
Letter accompanying subsequently filed items
Jul 25, 2024
Letter relating to Appeal Procedure
Jul 10, 2024
F3345 Forwarding of submissions to parties
Jul 5, 2024
(Electronic) Receipt
Jul 5, 2024
Letter accompanying subsequently filed items
Jul 5, 2024
Letter dealing with oral proceedings during the appeal procedure
Jun 25, 2024
Oral proceedings: change of venue
Jun 25, 2024
Oral proceedings: change of venue
Jun 21, 2024
F3345 Forwarding of submissions to parties
Jun 18, 2024
(Electronic) Receipt
Jun 18, 2024
Letter accompanying subsequently filed items
Jun 18, 2024
Letter dealing with oral proceedings during the appeal procedure
Jun 14, 2024
F3345 Forwarding of submissions to parties
Jun 10, 2024
(Electronic) Receipt
Jun 10, 2024
Letter accompanying subsequently filed items
Jun 10, 2024
Letter relating to Appeal Procedure
Jun 10, 2024
Letter relating to Appeal Procedure
Jun 4, 2024
F3011.1 Oral Proceedings: summons
Jun 4, 2024
F3011.1 Oral Proceedings: summons
Jun 4, 2024
Standard Communication Rule 103 (2) EPC
Jun 4, 2024
Standard Communication Rule 103 (2) EPC
May 29, 2024
F3010 Oral proceedings: order for summons
Apr 10, 2024
Composition of the board (T)
Sep 15, 2023
F3345 Forwarding of submissions to parties
Sep 12, 2023
(Electronic) Receipt
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Amended claims with annotations
Sep 12, 2023
Annexes (other than cited documents) regarding appeal procedure
Sep 12, 2023
Auxiliary request during appeals procedure - 01
Sep 12, 2023
Auxiliary request during appeals procedure - 02
Sep 12, 2023
Auxiliary request during appeals procedure - 03
Sep 12, 2023
Auxiliary request during appeals procedure - 04
Sep 12, 2023
Auxiliary request during appeals procedure - 05
Sep 12, 2023
Auxiliary request during appeals procedure - 06
Sep 12, 2023
Auxiliary request during appeals procedure - 07
Sep 12, 2023
Auxiliary request during appeals procedure - 08
Sep 12, 2023
Auxiliary request during appeals procedure - 09
Sep 12, 2023
Auxiliary request during appeals procedure - 10
Sep 12, 2023
Auxiliary request during appeals procedure - 11
Sep 12, 2023
Auxiliary request during appeals procedure - 12
Sep 12, 2023
Auxiliary request during appeals procedure - 13
Sep 12, 2023
Auxiliary request during appeals procedure - 14
Sep 12, 2023
Auxiliary request during appeals procedure - 15
Sep 12, 2023
Auxiliary request during appeals procedure - 16
Sep 12, 2023
Auxiliary request during appeals procedure - 17
Sep 12, 2023
Auxiliary request during appeals procedure - 18
Sep 12, 2023
Auxiliary request during appeals procedure - 19
Sep 12, 2023
Auxiliary request during appeals procedure - 20
Sep 12, 2023
Auxiliary request during appeals procedure - 21
Sep 12, 2023
Auxiliary request during appeals procedure - 22
Sep 12, 2023
Auxiliary request during appeals procedure - 23
Sep 12, 2023
Auxiliary request during appeals procedure - 24
Sep 12, 2023
Auxiliary request during appeals procedure - 25
Sep 12, 2023
Auxiliary request during appeals procedure - 26
Sep 12, 2023
Auxiliary request during appeals procedure - 27
Sep 12, 2023
Auxiliary request during appeals procedure - 28
Sep 12, 2023
Auxiliary request during appeals procedure - 29
Sep 12, 2023
Letter accompanying subsequently filed items
Sep 12, 2023
Reply to appeal
Sep 12, 2023
Reply to appeal
May 9, 2023
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Apr 28, 2023
(Electronic) Receipt
Apr 28, 2023
Letter accompanying subsequently filed items
Apr 28, 2023
Statement of grounds of appeal
Apr 28, 2023
Statement of grounds of appeal
Mar 10, 2023
F3204 Communication of the file number to the parties
Mar 1, 2023
(Electronic) Receipt
Mar 1, 2023
Letter accompanying subsequently filed items
Mar 1, 2023
Notice of appeal
Dec 29, 2022
(Electronic) Receipt
Dec 29, 2022
Advice of delivery
Dec 29, 2022
Letter accompanying subsequently filed items
Dec 23, 2022
Annex to the communication - opposition
Dec 23, 2022
Decision of the Opposition Division and instruction
Dec 23, 2022
Druckexemplar in opposition procedure
Dec 23, 2022
Grounds for the decision (Annex) - opposition
Dec 23, 2022
Interlocutory decision in opposition proceedings
Dec 23, 2022
Interlocutory decision in opposition proceedings
Dec 23, 2022
Means of redress
Dec 23, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Dec 23, 2022
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Dec 23, 2022
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Dec 23, 2022
Provision of a copy of the minutes - opposition procedure
Dec 23, 2022
Provision of a copy of the minutes - opposition procedure
Dec 23, 2022
Scanned annex to a communication - opposition procedure
Dec 23, 2022
Scanned annex to a communication - opposition procedure
Dec 23, 2022
Transmittal of decision / summons - opposition
Dec 23, 2022
Transmittal of decision / summons - opposition
Sep 23, 2022
Brief communication - Opposition proceedings
Sep 22, 2022
Information about the result of oral proceedings
Sep 20, 2022
(Electronic) Receipt
Sep 20, 2022
Letter accompanying subsequently filed items
Sep 20, 2022
Written submission in preparation to/during oral proceedings
Sep 7, 2022
Brief communication - Opposition proceedings
Aug 31, 2022
(Electronic) Receipt
Aug 31, 2022
Any annexes (other than citation) to an opposition letter
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure
Aug 31, 2022
Auxiliary request during Opposition procedure - 18
Aug 31, 2022
Auxiliary request during Opposition procedure - 19
Aug 31, 2022
Auxiliary request during Opposition procedure - 20
Aug 31, 2022
Auxiliary request during Opposition procedure - 21
Aug 31, 2022
Auxiliary request during Opposition procedure - 22
Aug 31, 2022
Auxiliary request during Opposition procedure - 23
Aug 31, 2022
Auxiliary request during Opposition procedure - 24
Aug 31, 2022
Auxiliary request during Opposition procedure - 25
Aug 31, 2022
Auxiliary request during Opposition procedure - 26
Aug 31, 2022
Auxiliary request during Opposition procedure - 27
Aug 31, 2022
Auxiliary request during Opposition procedure - 28
Aug 31, 2022
Auxiliary request during Opposition procedure - 29
Aug 31, 2022
Auxiliary request during Opposition procedure - 30
Aug 31, 2022
Auxiliary request during Opposition procedure - 31
Aug 31, 2022
Auxiliary request during Opposition procedure - 32
Aug 31, 2022
Auxiliary request during Opposition procedure - 33
Aug 31, 2022
Letter accompanying subsequently filed items
Aug 31, 2022
Written submission in preparation to/during oral proceedings
Aug 26, 2022
(Electronic) Receipt
Aug 26, 2022
Letter accompanying subsequently filed items
Aug 24, 2022
Brief communication - Opposition proceedings
Jul 29, 2022
Brief communication - Opposition proceedings
Jul 29, 2022
Brief communication - Opposition proceedings
Jul 22, 2022
(Electronic) Receipt
Jul 22, 2022
Letter accompanying subsequently filed items
Jul 22, 2022
Written submission in preparation to/during oral proceedings
Jul 21, 2022
(Electronic) Receipt
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Amended description with annotations
Jul 21, 2022
Any annexes (other than citation) to an opposition letter
Jul 21, 2022
Any annexes (other than citation) to an opposition letter
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure
Jul 21, 2022
Auxiliary request during Opposition procedure - 09
Jul 21, 2022
Auxiliary request during Opposition procedure - 10
Jul 21, 2022
Auxiliary request during Opposition procedure - 11
Jul 21, 2022
Auxiliary request during Opposition procedure - 12
Jul 21, 2022
Auxiliary request during Opposition procedure - 13
Jul 21, 2022
Auxiliary request during Opposition procedure - 14
Jul 21, 2022
Auxiliary request during Opposition procedure - 15
Jul 21, 2022
Auxiliary request during Opposition procedure - 16
Jul 21, 2022
Auxiliary request during Opposition procedure - 17
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Description
Jul 21, 2022
Letter accompanying subsequently filed items
Jul 21, 2022
Written submission in preparation to/during oral proceedings
May 27, 2022
Brief communication - Opposition proceedings
May 20, 2022
(Electronic) Receipt
May 20, 2022
Letter accompanying subsequently filed items
May 20, 2022
Oral proceedings: reply to date proposed
May 4, 2022
(Electronic) Receipt
Apr 28, 2022
Notification concerning the date of oral proceedings
Apr 28, 2022
Notification concerning the date of oral proceedings
Jan 11, 2022
(Electronic) Receipt
Jan 11, 2022
Letter accompanying subsequently filed items
Dec 10, 2021
Brief communication - Opposition proceedings
Dec 10, 2021
Brief communication - Opposition proceedings
Dec 6, 2021
(Electronic) Receipt
Dec 6, 2021
Letter accompanying subsequently filed items
Nov 26, 2021
(Electronic) Receipt
Nov 26, 2021
Advice of delivery
Nov 26, 2021
Letter accompanying subsequently filed items
Nov 25, 2021
(Electronic) Receipt
Nov 25, 2021
Advice of delivery
Nov 25, 2021
Annex to the communication - opposition
Nov 25, 2021
Information concerning oral proceedings
Nov 25, 2021
Letter accompanying subsequently filed items
Nov 25, 2021
Summons to attend oral proceedings
Nov 25, 2021
Summons to attend oral proceedings
Nov 25, 2021
Transmittal of decision / summons - opposition
Nov 25, 2021
Transmittal of decision / summons - opposition
Sep 20, 2021
Document concerning representation
Jun 11, 2021
Brief communication - Opposition proceedings
Jun 7, 2021
(Electronic) Receipt
Jun 7, 2021
Any annexes (other than citation) to an opposition letter
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure
Jun 7, 2021
Auxiliary request during Opposition procedure - 01
Jun 7, 2021
Auxiliary request during Opposition procedure - 02
Jun 7, 2021
Auxiliary request during Opposition procedure - 03
Jun 7, 2021
Auxiliary request during Opposition procedure - 04
Jun 7, 2021
Auxiliary request during Opposition procedure - 05
Jun 7, 2021
Auxiliary request during Opposition procedure - 06
Jun 7, 2021
Auxiliary request during Opposition procedure - 07
Jun 7, 2021
Auxiliary request during Opposition procedure - 08
Jun 7, 2021
Citation in opposition procedure
Jun 7, 2021
Letter accompanying subsequently filed items
Jun 7, 2021
Reply of the patent proprietor to the notice(s) of opposition
Feb 1, 2021
(Electronic) Receipt
Feb 1, 2021
Any annexes (other than citation) to an opposition letter
Feb 1, 2021
Letter accompanying subsequently filed items
Jan 29, 2021
Communication of a notice of opposition and request to file observations
Jan 29, 2021
Notice of further oppositions to opponent(s)
Jan 21, 2021
Communication of a notice of opposition - first information to patent proprietor
Jan 15, 2021
(Electronic) Receipt
Jan 15, 2021
Any annexes (other than citation) to an opposition letter
Jan 15, 2021
Citation in opposition procedure
Jan 15, 2021
Citation in opposition procedure
Jan 15, 2021
Citation in opposition procedure - 001
Jan 15, 2021
Citation in opposition procedure - 002
Jan 15, 2021
Citation in opposition procedure - 003
Jan 15, 2021
Citation in opposition procedure - 004
Jan 15, 2021
Citation in opposition procedure - 005
Jan 15, 2021
Citation in opposition procedure - 006
Jan 15, 2021
Citation in opposition procedure - 007
Jan 15, 2021
Citation in opposition procedure - 008
Jan 15, 2021
Citation in opposition procedure - 009
Jan 15, 2021
Citation in opposition procedure - 010
Jan 15, 2021
Consolidated list of cited opposition documents
Jan 15, 2021
Notice of opposition
Jan 15, 2021
Notice of opposition
Apr 27, 2020
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Mar 19, 2020
Decision to grant a European patent
Mar 4, 2020
(Electronic) Receipt
Mar 4, 2020
Filing of the translations of the claims
Mar 4, 2020
French translation of claims
Mar 4, 2020
German translation of the claims
Mar 4, 2020
Letter accompanying subsequently filed items
Jan 29, 2020
Bibliographic data of the European patent application
Jan 29, 2020
Communication about intention to grant a European patent
Jan 29, 2020
Intention to grant (signatures)
Jan 29, 2020
Text intended for grant (clean copy)
Jan 29, 2020
Text intended for grant (version for approval)
Dec 17, 2019
Examination started
Oct 21, 2019
(Electronic) Receipt
Oct 21, 2019
Amended claims filed after receipt of (European) search report
Oct 21, 2019
Amended claims with annotations
Oct 21, 2019
Amended description filed after receipt of (European) search report
Oct 21, 2019
Amended description with annotations
Oct 21, 2019
Amendments received before examination
Oct 21, 2019
Letter accompanying subsequently filed items
Oct 7, 2019
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Sep 17, 2019
Communication regarding the transmission of the European search report
Sep 17, 2019
European search opinion
Sep 17, 2019
Information on Search Strategy
Sep 17, 2019
Supplementary European search report
Aug 20, 2019
Search started
Aug 6, 2019
Communication of the registration of a transfer or change of name and/or address
Aug 1, 2019
Annexes in respect of a client data request
Aug 1, 2019
Annexes in respect of a client data request
Aug 1, 2019
Letter accompanying subsequently filed items
Jun 26, 2019
Notification of forthcoming publication
Jun 10, 2019
Submission concerning change of applicant's name
Jun 10, 2019
Submission concerning change of applicant's name
Apr 23, 2019
Communication to designated inventor
Apr 23, 2019
Communication to designated inventor
Apr 2, 2019
Copy of the international preliminary report on patentability
Apr 2, 2019
Translation of the international preliminary report on patentability
Dec 18, 2018
Information regarding early processing
Dec 3, 2018
(Electronic) Receipt
Dec 3, 2018
Abstract
Dec 3, 2018
Claims
Dec 3, 2018
Description
Dec 3, 2018
Drawings
Dec 3, 2018
Matter concerning the application
Dec 3, 2018
Request for entry into the European phase
Sep 26, 2018
Notification of the recording of a change
Apr 9, 2018
Priority document (electronically transmitted)
Mar 22, 2018
Copy of the international search report
Mar 22, 2018
Copy of the translated international search report
Mar 22, 2018
International publication pamphlet

EP3514431

NIPPON STEEL

Application Number: EP17851037A
Filing Date: Sep 15, 2017
Status: Patent Maintained As Amended; Aug 1, 2025
Publication Date: Sep 3, 2025
External Links: Slate, Register , Google Patents

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Threaded Joint

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Dossier Documents

EP3514431