The weekly litigation news digest is live. Subscribe now
The patent EP2809881 was granted to MTU Aero Engines on Jan 10, 2018. The application was filed on Jan 18, 2013 under application number EP13749721A. The patent is currently recorded with a legal status of "Revoked".

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 | Opposition Status |
|---|---|---|---|
| SAFRAN AIRCRAFT ENGINES | Oct 8, 2018 | REGIMBEAU | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2009191047 |
| INTERNATIONAL-SEARCH-REPORT | US2009260345 |
| INTERNATIONAL-SEARCH-REPORT | US2010192595 |
| INTERNATIONAL-SEARCH-REPORT | US2850226 |
| INTERNATIONAL-SEARCH-REPORT | US2957655 |
| INTERNATIONAL-SEARCH-REPORT | WO0019082 |
| OPPOSITION | US3194487 |
| OPPOSITION | US3373928 |
| OPPOSITION | US7806651 |
| OPPOSITION | US8246292 |
| OTHER | US2004128978 |
| OTHER | US2008022691 |
| OTHER | US2009191047 |
| OTHER | US2009301055 |
| OTHER | US2010192595 |
| OTHER | US3194487 |
| SEARCH | EP2157305 |
| SEARCH | FR2260701 |
| SEARCH | US2009191047 |
| SEARCH | US3194487 |
| SEARCH | US3373928 |
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
Get instant alerts for new documents
Jan 29, 2024
Refund of fees
OPPO
Jan 25, 2024
Jan 25, 2024
Jan 15, 2024
Jan 15, 2024
Jan 10, 2024
(Electronic) Receipt
Appeal
Jan 10, 2024
Advice of delivery
Appeal
Jan 10, 2024
Jan 10, 2024
Dec 20, 2023
Dec 14, 2023
Dec 14, 2023
Nov 22, 2023
Nov 15, 2023
(Electronic) Receipt
Appeal
Nov 15, 2023
Nov 15, 2023
Oct 12, 2023
Oct 12, 2023
Oct 4, 2023
Sep 27, 2023
Annexes in respect of a client data request
Search/Exam
Sep 27, 2023
Letter accompanying subsequently filed items
Search/Exam
Sep 27, 2023
Sep 9, 2023
Sep 5, 2023
Sep 5, 2023
Sep 4, 2023
(Electronic) Receipt
Appeal
Sep 4, 2023
Sep 4, 2023
Aug 31, 2023
May 17, 2023
Mar 3, 2023
Feb 24, 2023
(Electronic) Receipt
Appeal
Feb 24, 2023
Feb 24, 2023
Nov 9, 2022
Nov 3, 2022
(Electronic) Receipt
Appeal
Nov 3, 2022
Nov 3, 2022
Nov 3, 2022
Nov 3, 2022
Nov 3, 2022
Nov 3, 2022
Jan 26, 2022
Jan 20, 2022
(Electronic) Receipt
Appeal
Jan 20, 2022
Jan 20, 2022
Reply to appeal
Appeal
Sep 30, 2021
Sep 24, 2021
(Electronic) Receipt
Appeal
Sep 24, 2021
Sep 24, 2021
Sep 7, 2021
Sep 7, 2021
Jul 23, 2021
(Electronic) Receipt
Appeal
Jul 23, 2021
Jul 23, 2021
Notice of appeal
Appeal
May 21, 2021
May 14, 2021
May 14, 2021
May 14, 2021
Mar 12, 2021
Mar 11, 2021
Mar 11, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 3, 2021
Mar 3, 2021
Mar 3, 2021
Feb 26, 2021
Feb 19, 2021
Feb 8, 2021
Authorisation
OPPO
Feb 8, 2021
Jan 18, 2021
Jan 12, 2021
Jan 12, 2021
Jan 11, 2021
Jan 11, 2021
Dec 22, 2020
Dec 22, 2020
Dec 18, 2020
Dec 18, 2020
Dec 18, 2020
Jul 8, 2020
Jul 8, 2020
Jul 8, 2020
Jun 17, 2020
Jun 17, 2020
Jun 17, 2020
Jun 12, 2020
Jun 12, 2020
Jun 12, 2020
Jun 12, 2020
Jun 12, 2020
Jun 12, 2020
Mar 31, 2020
Mar 31, 2020
Mar 31, 2020
Mar 18, 2020
Mar 16, 2020
Mar 16, 2020
Mar 16, 2020
Mar 16, 2020
Mar 12, 2020
Mar 10, 2020
Mar 10, 2020
Mar 10, 2020
Mar 9, 2020
Mar 9, 2020
Mar 9, 2020
Mar 9, 2020
Mar 9, 2020
Mar 9, 2020
Mar 6, 2020
Mar 6, 2020
Mar 6, 2020
Jan 21, 2020
Jan 13, 2020
Jan 13, 2020
Jan 13, 2020
Aug 28, 2019
Aug 28, 2019
Aug 28, 2019
Aug 28, 2019
Aug 28, 2019
Aug 28, 2019
Aug 16, 2019
Aug 1, 2019
Aug 1, 2019
Aug 1, 2019
Aug 1, 2019
Aug 1, 2019
Jul 30, 2019
Jul 30, 2019
Jul 22, 2019
Jul 22, 2019
Jul 22, 2019
Jul 22, 2019
Jul 22, 2019
Jul 22, 2019
Mar 12, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Dec 17, 2018
Dec 7, 2018
Dec 7, 2018
Dec 7, 2018
Dec 7, 2018
Oct 25, 2018
Oct 25, 2018
Oct 16, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
Oct 8, 2018
May 28, 2018
May 17, 2018
Jan 26, 2018
Dec 14, 2017
Decision to grant a European patent
Search/Exam
Nov 24, 2017
(Electronic) Receipt
Search/Exam
Nov 24, 2017
Filing of the translations of the claims
Search/Exam
Nov 24, 2017
French translation of claims
Search/Exam
Nov 24, 2017
German translation of the claims
Search/Exam
Nov 24, 2017
Letter accompanying subsequently filed items
Search/Exam
Sep 22, 2017
Sep 22, 2017
Sep 22, 2017
Intention to grant (signatures)
Search/Exam
Sep 22, 2017
Text intended for grant (clean copy)
Search/Exam
Sep 22, 2017
May 2, 2017
(Electronic) Receipt
Search/Exam
May 2, 2017
Amended claims with annotations
Search/Exam
May 2, 2017
Amended description with annotations
Search/Exam
May 2, 2017
Claims
Search/Exam
May 2, 2017
Description
Search/Exam
May 2, 2017
Letter accompanying subsequently filed items
Search/Exam
May 2, 2017
Dec 19, 2016
Annex to the communication
Search/Exam
Dec 19, 2016
Communication from the Examining Division
Search/Exam
Sep 21, 2016
Sep 16, 2016
Sep 15, 2016
Sep 12, 2016
(Electronic) Receipt
Search/Exam
Sep 12, 2016
Amended claims with annotations
Search/Exam
Sep 12, 2016
Amended description with annotations
Search/Exam
Sep 12, 2016
Claims
Search/Exam
Sep 12, 2016
Description
Search/Exam
Sep 12, 2016
Letter accompanying subsequently filed items
Search/Exam
Sep 12, 2016
May 2, 2016
Annex to the communication
Search/Exam
May 2, 2016
Communication from the Examining Division
Search/Exam
Feb 22, 2016
CDS Clean up - amended applicant details
Search/Exam
Jan 21, 2016
(Electronic) Receipt
Search/Exam
Jan 21, 2016
Amended claims with annotations
Search/Exam
Jan 21, 2016
Amended description with annotations
Search/Exam
Jan 21, 2016
Claims
Search/Exam
Jan 21, 2016
Description
Search/Exam
Jan 21, 2016
Letter accompanying subsequently filed items
Search/Exam
Jan 21, 2016
Sep 11, 2015
Annex to the communication
Search/Exam
Sep 11, 2015
Communication from the Examining Division
Search/Exam
Jul 22, 2015
Jul 22, 2015
Supplementary European search report
Search/Exam
Jul 15, 2015
Search started
Search/Exam
Apr 14, 2015
(Electronic) Receipt
Search/Exam
Apr 14, 2015
General enquiry
Search/Exam
Apr 14, 2015
Letter accompanying subsequently filed items
Search/Exam
Apr 10, 2015
Mar 9, 2015
Non-patent literature filed by a third party
Search/Exam
Mar 9, 2015
Non-patent literature filed by a third party
Search/Exam
Mar 9, 2015
Non-patent literature filed by a third party
Search/Exam
Mar 9, 2015
Non-patent literature filed by a third party
Search/Exam
Mar 9, 2015
Observations by third parties
Search/Exam
Mar 9, 2015
Patent document filed by a Third party
Search/Exam
Mar 9, 2015
Patent document filed by a Third party
Search/Exam
Mar 9, 2015
Patent document filed by a Third party
Search/Exam
Mar 9, 2015
Patent document filed by a Third party
Search/Exam
Nov 12, 2014
Sep 5, 2014
Communication to designated inventor
Search/Exam
Sep 5, 2014
Communication to designated inventor
Search/Exam
Sep 5, 2014
Communication to designated inventor
Search/Exam
Aug 20, 2014
Jun 27, 2014
Information on entry into European phase
Search/Exam
Jun 19, 2014
Jun 17, 2014
(Electronic) Receipt
Search/Exam
Jun 17, 2014
Jun 17, 2014
Amended claims with annotations
Search/Exam
Jun 17, 2014
Amendments received before examination
Search/Exam
Jun 17, 2014
Request for entry into the European phase
Search/Exam
Jun 12, 2014
Jun 4, 2014
Jun 2, 2014
May 20, 2014
Notification of the recording of a change
Search/Exam
May 20, 2014
Notification of the recording of a change
Search/Exam
Sep 11, 2013
Sep 11, 2013