Hybridisation Of The Compressors Of A Turbojet

Patent No. EP3177820 (titled "Hybridisation Of The Compressors Of A Turbojet") was filed by Safran Aircraft Engines on Aug 4, 2015. The application was issued on Aug 27, 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
RAYTHEON	Apr 15, 2021	DEHNS

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 31, 2025
Decision to maintain the European patent in amended form
Jul 31, 2025
Decision to maintain the European patent in amended form
Jul 23, 2025
(Electronic) Receipt
Jul 23, 2025
English translation of the claims
Jul 23, 2025
Filing of the translation of the amended claims
Jul 23, 2025
German translation of the claims
Jul 16, 2025
Communication with request to file translations
Jul 9, 2025
Maintenance of the patent with the documents specified in the final decision
Jul 9, 2025
Refund of fees
Jul 8, 2025
F3013 Oral Proceedings: Forwarding minutes
Jul 8, 2025
F3013 Oral Proceedings: Forwarding minutes
Jul 8, 2025
F3316 Oral Proceedings: Minutes (Appellant: Opponent)
Jul 8, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Jul 8, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
May 28, 2025
F3018 Oral proceedings: Confirmation interpreters
May 28, 2025
F3018 Oral proceedings: Confirmation interpreters
Mar 4, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Mar 4, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Feb 26, 2025
F3345 Forwarding of submissions to parties
Feb 20, 2025
(Electronic) Receipt
Feb 20, 2025
Letter accompanying subsequently filed items
Jan 14, 2025
F3011.2 Oral Proceedings: Summons VICO
Jan 14, 2025
F3011.2 Oral Proceedings: Summons VICO
Jan 14, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jan 14, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jan 9, 2025
F3010 Oral proceedings: order for summons
Nov 22, 2024
F3345 Forwarding of submissions to parties
Nov 19, 2024
(Electronic) Receipt
Nov 19, 2024
Amended claims with annotations
Nov 19, 2024
Auxiliary request during appeals procedure - 06
Nov 19, 2024
Letter accompanying subsequently filed items
Nov 19, 2024
Letter relating to Appeal Procedure
Nov 7, 2024
Composition of the board (T)
Aug 21, 2024
F3345 Forwarding of submissions to parties
Aug 16, 2024
(Electronic) Receipt
Aug 16, 2024
Letter accompanying subsequently filed items
Aug 16, 2024
Letter relating to Appeal Procedure
Apr 8, 2024
F3345 Forwarding of submissions to parties
Mar 28, 2024
(Electronic) Receipt
Mar 28, 2024
Amended claims with annotations
Mar 28, 2024
Amended claims with annotations
Mar 28, 2024
Amended claims with annotations
Mar 28, 2024
Amended claims with annotations
Mar 28, 2024
Amended claims with annotations
Mar 28, 2024
Auxiliary request during appeals procedure - 01
Mar 28, 2024
Auxiliary request during appeals procedure - 02
Mar 28, 2024
Auxiliary request during appeals procedure - 03
Mar 28, 2024
Auxiliary request during appeals procedure - 04
Mar 28, 2024
Auxiliary request during appeals procedure - 05
Mar 28, 2024
Letter accompanying subsequently filed items
Mar 28, 2024
Main request during appeals procedure
Mar 28, 2024
Reply to appeal
Dec 1, 2023
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Nov 27, 2023
(Electronic) Receipt
Nov 27, 2023
Citation in appeal procedure - 001
Nov 27, 2023
Citation in appeal procedure - 003
Nov 27, 2023
Citation in appeal procedure - 004
Nov 27, 2023
Citation in appeal procedure - 007
Nov 27, 2023
Letter accompanying subsequently filed items
Nov 27, 2023
Statement of grounds of appeal
Oct 5, 2023
F3204 Communication of the file number to the parties
Oct 5, 2023
F3204 Communication of the file number to the parties
Sep 27, 2023
(Electronic) Receipt
Sep 27, 2023
Letter accompanying subsequently filed items
Sep 27, 2023
Notice of appeal
Jul 27, 2023
(Electronic) Receipt
Jul 27, 2023
Advice of delivery
Jul 27, 2023
Letter accompanying subsequently filed items
Jul 17, 2023
Annex to the communication - opposition
Jul 17, 2023
Decision of the Opposition Division and instruction
Jul 17, 2023
Decision of the Opposition Division and instruction
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
Sep 28, 2022
Information about the result of oral proceedings
Aug 4, 2022
Brief communication - Opposition proceedings
Aug 3, 2022
Brief communication - Opposition proceedings
Jul 28, 2022
(Electronic) Receipt
Jul 28, 2022
Citation in opposition procedure - 013
Jul 28, 2022
Citation in opposition procedure - 014
Jul 28, 2022
Consolidated list of cited opposition documents
Jul 28, 2022
Letter accompanying subsequently filed items
Jul 28, 2022
Written submission in preparation to/during oral proceedings
Jul 27, 2022
(Electronic) Receipt
Jul 27, 2022
Citation in opposition procedure - 012
Jul 27, 2022
Letter accompanying subsequently filed items
Jul 27, 2022
Written submission in preparation to/during oral proceedings
Jun 30, 2022
Brief communication - Opposition proceedings
Jun 23, 2022
(Electronic) Receipt
Jun 23, 2022
Request for interpreters during oral proceedings
Jun 23, 2022
Written submission in preparation to/during oral proceedings
Apr 21, 2022
Notification concerning the date of oral proceedings
Apr 21, 2022
Notification concerning the date of oral proceedings
Jan 31, 2022
(Electronic) Receipt
Jan 31, 2022
Advice of delivery
Jan 31, 2022
Letter accompanying subsequently filed items
Jan 14, 2022
Advice of delivery
Jan 14, 2022
Annex to the communication - opposition
Jan 14, 2022
Information concerning oral proceedings
Jan 14, 2022
Summons to attend oral proceedings
Jan 14, 2022
Summons to attend oral proceedings
Jan 14, 2022
Transmittal of decision / summons - opposition
Jan 14, 2022
Transmittal of decision / summons - opposition
Sep 2, 2021
Brief communication - Opposition proceedings
Aug 27, 2021
(Electronic) Receipt
Aug 27, 2021
Auxiliary request during Opposition procedure
Aug 27, 2021
Auxiliary request during Opposition procedure
Aug 27, 2021
Auxiliary request during Opposition procedure
Aug 27, 2021
Auxiliary request during Opposition procedure
Aug 27, 2021
Auxiliary request during Opposition procedure - 01
Aug 27, 2021
Auxiliary request during Opposition procedure - 02
Aug 27, 2021
Auxiliary request during Opposition procedure - 03
Aug 27, 2021
Auxiliary request during Opposition procedure - 04
Aug 27, 2021
Citation in opposition procedure - 011
Aug 27, 2021
Letter accompanying subsequently filed items
Aug 27, 2021
Reply of the patent proprietor to the notice(s) of opposition
Apr 30, 2021
Communication of a notice of opposition and request to file observations
Apr 30, 2021
Notice of further oppositions to opponent(s)
Apr 23, 2021
Communication of a notice of opposition - first information to patent proprietor
Apr 15, 2021
(Electronic) Receipt
Apr 15, 2021
Citation in opposition procedure - 001
Apr 15, 2021
Citation in opposition procedure - 002
Apr 15, 2021
Citation in opposition procedure - 003
Apr 15, 2021
Citation in opposition procedure - 004
Apr 15, 2021
Citation in opposition procedure - 005
Apr 15, 2021
Citation in opposition procedure - 006
Apr 15, 2021
Citation in opposition procedure - 007
Apr 15, 2021
Citation in opposition procedure - 008
Apr 15, 2021
Citation in opposition procedure - 009
Apr 15, 2021
Citation in opposition procedure - 010
Apr 15, 2021
Notice of opposition
Apr 15, 2021
Notice of opposition
Jul 27, 2020
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jun 18, 2020
Decision to grant a European patent
Jun 15, 2020
Intention to grant (signatures)
Jun 4, 2020
Bibliographic data of the European patent application
Jun 4, 2020
Information about intention to grant a patent
Jun 4, 2020
Text intended for grant (clean copy)
Jun 4, 2020
Text intended for grant (version for approval)
May 13, 2020
(Electronic) Receipt
May 13, 2020
Amended description with annotations
May 13, 2020
Description
May 13, 2020
English translation of the claims
May 13, 2020
German translation of the claims
May 13, 2020
Letter accompanying subsequently filed items
May 13, 2020
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
Jan 30, 2020
Bibliographic data of the European patent application
Jan 30, 2020
Communication about intention to grant a European patent
Jan 30, 2020
Intention to grant (signatures)
Jan 30, 2020
Text intended for grant (clean copy)
Jan 30, 2020
Text intended for grant (version for approval)
Jan 17, 2020
(Electronic) Receipt
Jan 17, 2020
Amended claims with annotations
Jan 17, 2020
Claims
Jan 17, 2020
Letter accompanying subsequently filed items
Jan 17, 2020
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
Jan 3, 2020
Bibliographic data of the European patent application
Jan 3, 2020
Communication about intention to grant a European patent
Jan 3, 2020
Intention to grant (signatures)
Jan 3, 2020
Text intended for grant (clean copy)
Jan 3, 2020
Text intended for grant (version for approval)
Sep 3, 2019
Submission concerning representation
Mar 1, 2019
(Electronic) Receipt
Mar 1, 2019
Amended description with annotations
Mar 1, 2019
Description
Mar 1, 2019
Letter accompanying subsequently filed items
Mar 1, 2019
Reply to communication from the Examining Division
Feb 18, 2019
Annex to the communication
Feb 18, 2019
Communication from the Examining Division
Feb 12, 2019
Examination started
Nov 26, 2018
Notification regarding date of start of examination with possibility to withdraw
May 17, 2017
Notification on forthcoming publication of bibliographic data
Mar 21, 2017
Communication regarding comments on written opinion/amendment of application/payment of claims fee
Mar 14, 2017
Priority search results copy provided by EPO
Mar 13, 2017
Communication to designated inventor
Mar 13, 2017
Communication to designated inventor
Mar 13, 2017
Communication to designated inventor
Feb 28, 2017
Copy of the international preliminary report on patentability
Jan 25, 2017
(Electronic) Receipt
Jan 25, 2017
Amended claims filed after receipt of (European) search report
Jan 25, 2017
Amended claims with annotations
Jan 25, 2017
Amendments received before examination
Jan 25, 2017
Request for entry into the European phase
Dec 16, 2016
Information on entry into European phase
Sep 14, 2016
Notification of the recording of a change
Sep 14, 2016
Notification of the recording of a change
Mar 22, 2016
Notification of the recording of a change
Mar 1, 2016
Priority document (electronically transmitted)
Feb 11, 2016
Copy of the international search report
Feb 11, 2016
Copy of the international search report
Feb 11, 2016
Published international application - A1
Nov 17, 2015
ISR: cited documents
Nov 17, 2015
International Search Report - copy in English for the IB
Nov 16, 2015
Written opinion of the ISA, boxes No. I to VIII
Nov 16, 2015
Written opinion of the ISA, cover sheet
Nov 16, 2015
Written opinion of the ISA, supplemental box
Sep 15, 2015
Notification of receipt of Search copy
Sep 3, 2015
Request form for international application (copy for ISA/EP)
Aug 4, 2015
Abstract
Aug 4, 2015
Claims
Aug 4, 2015
Description
Aug 4, 2015
Drawings

EP3177820

SAFRAN AIRCRAFT ENGINES

Application Number: EP15757536A
Filing Date: Aug 4, 2015
Status: Patent Maintained As Amended; Jul 25, 2025
Publication Date: Aug 27, 2025
External Links: Slate, Register , Google Patents

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Hybridisation Of The Compressors Of A Turbojet

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Dossier Documents

EP3177820