Balance Piston For Multiphase Fluid Processing

Patent No. EP2976505 (titled "Balance Piston For Multiphase Fluid Processing") was filed by Onesubsea UK on Mar 18, 2014. The application was issued on Jun 18, 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
SULZER MANAGEMENT	May 10, 2022	IPS IRSCH

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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May 22, 2025
Decision to maintain the European patent in amended form
May 22, 2025
Decision to maintain the European patent in amended form
May 9, 2025
(Electronic) Receipt
May 9, 2025
Amended description with annotations
May 9, 2025
Description
May 9, 2025
Filing of the translation of the amended claims
May 9, 2025
French translation of claims
May 9, 2025
German translation of the claims
May 9, 2025
Letter accompanying subsequently filed items
Apr 1, 2025
Communication of bibliographic data
Apr 1, 2025
Communication to opponent concerning maintenance
Apr 1, 2025
Communication with request to file translations
Feb 18, 2025
Maintenance of the patent with the documents specified in the final decision
Nov 15, 2024
Annex to the communication - opposition
Nov 15, 2024
Brief communication - Opposition proceedings
Nov 15, 2024
Brief communication - Opposition proceedings
Nov 15, 2024
Decision of the Opposition Division and instruction
Nov 15, 2024
Grounds for the decision (Annex) - opposition
Nov 15, 2024
Interlocutory decision in opposition proceedings
Nov 15, 2024
Interlocutory decision in opposition proceedings
Nov 15, 2024
Means of redress
Nov 15, 2024
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Nov 15, 2024
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Nov 15, 2024
OPPODREX with handwritten amendments
Nov 15, 2024
Provision of a copy of the minutes - opposition procedure
Nov 15, 2024
Provision of a copy of the minutes - opposition procedure
Nov 15, 2024
Scanned annex to a communication - opposition procedure
Nov 15, 2024
Scanned annex to a communication - opposition procedure
Sep 25, 2024
Information about the result of oral proceedings
Aug 2, 2024
Brief communication - Opposition proceedings
Jul 31, 2024
Brief communication - Opposition proceedings
Jul 25, 2024
(Electronic) Receipt
Jul 25, 2024
Auxiliary request during Opposition procedure
Jul 25, 2024
Auxiliary request during Opposition procedure
Jul 25, 2024
Auxiliary request during Opposition procedure
Jul 25, 2024
Auxiliary request during Opposition procedure
Jul 25, 2024
Auxiliary request during Opposition procedure - 01
Jul 25, 2024
Auxiliary request during Opposition procedure - 02
Jul 25, 2024
Auxiliary request during Opposition procedure - 04
Jul 25, 2024
Auxiliary request during Opposition procedure - 04
Jul 25, 2024
Letter accompanying subsequently filed items
Jul 25, 2024
Main request during Opposition procedure
Jul 25, 2024
Main request during Opposition procedure
Jul 25, 2024
Notice of opposition
Jul 24, 2024
(Electronic) Receipt
Jul 24, 2024
Letter accompanying subsequently filed items
Jul 24, 2024
Written submission in preparation to/during oral proceedings
Feb 28, 2024
Annex to the communication - opposition
Feb 28, 2024
Brief communication - Opposition proceedings
Feb 28, 2024
Brief communication - Opposition proceedings
Feb 28, 2024
Information concerning oral proceedings
Feb 28, 2024
Scanned annex to a communication - opposition procedure
Feb 28, 2024
Summons to attend oral proceedings
Feb 28, 2024
Summons to attend oral proceedings
Jun 15, 2023
Brief communication - Opposition proceedings
Jun 13, 2023
Refund of fees
Jun 5, 2023
(Electronic) Receipt
Jun 5, 2023
Letter accompanying subsequently filed items
Jun 5, 2023
Reply to an examination report in opposition proceedings
Jan 25, 2023
Annex to the communication - opposition
Jan 25, 2023
Brief communication - Opposition proceedings
Jan 25, 2023
Brief communication - Opposition proceedings
Jan 25, 2023
Communication inviting the parties to file observations
Jan 25, 2023
Communication inviting the parties to file observations
Oct 12, 2022
Brief communication - Opposition proceedings
Oct 4, 2022
(Electronic) Receipt
Oct 4, 2022
Auxiliary request during Opposition procedure
Oct 4, 2022
Auxiliary request during Opposition procedure
Oct 4, 2022
Auxiliary request during Opposition procedure
Oct 4, 2022
Auxiliary request during Opposition procedure - 01
Oct 4, 2022
Auxiliary request during Opposition procedure - 02
Oct 4, 2022
Auxiliary request during Opposition procedure - 03
Oct 4, 2022
Letter accompanying subsequently filed items
Oct 4, 2022
Main request during Opposition procedure
Oct 4, 2022
Main request during Opposition procedure
Oct 4, 2022
Reply of the patent proprietor to the notice(s) of opposition
May 25, 2022
Communication of a notice of opposition and request to file observations
May 25, 2022
Notice of further oppositions to opponent(s)
May 24, 2022
Communication of a notice of opposition - first information to patent proprietor
May 10, 2022
(Electronic) Receipt
May 10, 2022
Any annexes (other than citation) to an opposition letter
May 10, 2022
Citation in opposition procedure - 001
May 10, 2022
Citation in opposition procedure - 002
May 10, 2022
Citation in opposition procedure - 003
May 10, 2022
Citation in opposition procedure - 004
May 10, 2022
Citation in opposition procedure - 005
May 10, 2022
Citation in opposition procedure - 006
May 10, 2022
Citation in opposition procedure - 007
May 10, 2022
Citation in opposition procedure - 008
May 10, 2022
Citation in opposition procedure - 009
May 10, 2022
Citation in opposition procedure - 010
May 10, 2022
Citation in opposition procedure - 011
May 10, 2022
Citation in opposition procedure - 012
May 10, 2022
Citation in opposition procedure - 013
May 10, 2022
Citation in opposition procedure - 014
May 10, 2022
Citation in opposition procedure - 015
May 10, 2022
Citation in opposition procedure - 016
May 10, 2022
Citation in opposition procedure - 016
May 10, 2022
Citation in opposition procedure - 017
May 10, 2022
Citation in opposition procedure - 018
May 10, 2022
Consolidated list of cited opposition documents
May 10, 2022
Notice of opposition
May 10, 2022
Notice of opposition
Aug 24, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jul 15, 2021
Decision to grant a European patent
Jul 2, 2021
(Electronic) Receipt
Jul 2, 2021
French translation of claims
Jul 2, 2021
German translation of the claims
Jul 2, 2021
Letter accompanying subsequently filed items
Mar 10, 2021
Bibliographic data of the European patent application
Mar 10, 2021
Communication about intention to grant a European patent
Mar 10, 2021
Text intended for grant (clean copy)
Mar 10, 2021
Text intended for grant (version for approval)
Mar 9, 2021
Intention to grant (signatures)
Feb 17, 2021
Examination started
Sep 10, 2018
Letter concerning fees and payments
Jul 4, 2018
Submission concerning representation
Jun 12, 2018
Submission concerning representation
Nov 28, 2017
Communication of amended entries concerning the representative
Nov 20, 2017
Annexes in respect of a client data request
Nov 20, 2017
Submission concerning change of applicant's representative
Nov 16, 2017
Submission concerning change of applicant's representative
Nov 2, 2017
General authorisation
Nov 2, 2017
Submission concerning change of applicant's representative
Oct 20, 2017
(Electronic) Receipt
Oct 20, 2017
Amended claims filed after receipt of (European) search report
Oct 20, 2017
Amended claims with annotations
Oct 20, 2017
Amended description filed after receipt of (European) search report
Oct 20, 2017
Amended description with annotations
Oct 20, 2017
Amendments received before examination
Oct 20, 2017
Letter accompanying subsequently filed items
Apr 11, 2017
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Mar 24, 2017
Communication regarding the transmission of the European search report
Mar 24, 2017
European search opinion
Mar 24, 2017
Information on Search Strategy
Mar 24, 2017
Supplementary European search report
Dec 1, 2016
Final instructions (loss of partial rights)
Aug 1, 2016
Claim deemed abandoned
Feb 4, 2016
Communication of amended entries concerning the representative
Feb 3, 2016
Communication to designated inventor
Jan 30, 2016
Submission concerning change of applicant's representative
Jan 25, 2016
(Electronic) Receipt
Jan 25, 2016
Letter accompanying subsequently filed items
Jan 7, 2016
Notification on forthcoming publication of bibliographic data
Jan 4, 2016
Invitation to indicate correct address of inventor
Dec 16, 2015
Letter which had not been notified
Dec 1, 2015
Communication regarding possible amendment of the application/payment of claims fee
Nov 27, 2015
Communication to designated inventor
Nov 27, 2015
Communication to designated inventor
Oct 16, 2015
(Electronic) Receipt
Oct 16, 2015
Request for entry into the European phase
Oct 6, 2015
Copy of the international preliminary report on patentability
Jul 29, 2015
Information on entry into European phase
Feb 12, 2015
Notification of the recording of a change
Oct 14, 2014
Priority document (electronically transmitted)
Sep 25, 2014
Copy of the international search report
Sep 25, 2014
Published international application - A1

EP2976505

ONESUBSEA UK

Application Number: EP14768808A
Filing Date: Mar 18, 2014
Status: Patent Maintained As Amended; May 16, 2025
Publication Date: Jun 18, 2025
External Links: Slate, Register , Google Patents

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Balance Piston For Multiphase Fluid Processing

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Dossier Documents

EP2976505