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The patent EP2552590 was granted to Safran Aircraft Engines on Feb 22, 2023. The application was originally filed on Mar 21, 2011 under application number EP11715956A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | FR2848128 |
| INTERNATIONAL-SEARCH-REPORT | GB855928 |
| INTERNATIONAL-SEARCH-REPORT | US2002088756 |
| INTERNATIONAL-SEARCH-REPORT | US2003183580 |
| INTERNATIONAL-SEARCH-REPORT | US2693979 |
| INTERNATIONAL-SEARCH-REPORT | US5043063 |
| INTERNATIONAL-SEARCH-REPORT | WO8705536 |
| OPPOSITION | GB2232098 |
| OPPOSITION | US2007262028 |
| OPPOSITION | US2594955 |
| OPPOSITION | US2975667 |
| OPPOSITION | US3068316 |
| OPPOSITION | US4644610 |
| OPPOSITION | US5043063 |
| OPPOSITION | US5619569 |
| OPPOSITION | US5906303 |
| OPPOSITION | US6173851 |
| OPPOSITION | USD425740S |
| OPPOSITION | USD445980S |
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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Jan 26, 2023
Jan 26, 2023
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Oct 21, 2022
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Oct 13, 2022
Sep 26, 2022
Refund of fees
Appeal
Sep 16, 2022
Sep 16, 2022
Sep 13, 2022
Sep 12, 2022
(Electronic) Receipt
Appeal
Sep 12, 2022
Withdrawal of an appeal
Appeal
Jul 15, 2022
Jul 15, 2022
Jul 12, 2022
(Electronic) Receipt
Appeal
Jul 12, 2022
Jul 12, 2022
Notice of appeal
Appeal
May 11, 2022
May 11, 2022
May 2, 2022
May 2, 2022
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Means of redress
OPPO
May 2, 2022
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Jun 3, 2019
Apr 26, 2019
Decision to grant a European patent
Search/Exam
Apr 9, 2019
(Electronic) Receipt
Search/Exam
Apr 9, 2019
English translation of the claims
Search/Exam
Apr 9, 2019
Filing of the translations of the claims
Search/Exam
Apr 9, 2019
German translation of the claims
Search/Exam
Apr 9, 2019
Letter accompanying subsequently filed items
Search/Exam
Jan 18, 2019
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Intention to grant (signatures)
Search/Exam
Jan 18, 2019
Text intended for grant (clean copy)
Search/Exam
Jan 18, 2019
Jun 11, 2018
Jun 1, 2018
Jun 21, 2016
(Electronic) Receipt
Search/Exam
Jun 21, 2016
Claims
Search/Exam
Jun 21, 2016
Description
Search/Exam
Jun 21, 2016
Letter accompanying subsequently filed items
Search/Exam
Jun 21, 2016
Jun 21, 2016
Jan 19, 2016
Jan 14, 2016
(Electronic) Receipt
Search/Exam
Jan 14, 2016
Letter accompanying subsequently filed items
Search/Exam
Jan 14, 2016
Jan 13, 2016
Annex to the communication
Search/Exam
Jan 13, 2016
Communication from the Examining Division
Search/Exam
Dec 23, 2015
Examination started
Search/Exam
Dec 12, 2014
Jan 9, 2013
Dec 4, 2012
Nov 30, 2012
Communication to designated inventor
Search/Exam
Nov 30, 2012
Communication to designated inventor
Search/Exam
Nov 27, 2012
Priority search results copy provided by EPO
Search/Exam
Oct 26, 2012
(Electronic) Receipt
Search/Exam
Oct 26, 2012
Request for entry into the European phase
Search/Exam
Oct 15, 2012
Aug 10, 2012
Information on entry into European phase
Search/Exam
Oct 26, 2011
Oct 6, 2011
Copy of the international search report
Search/Exam
Oct 6, 2011
Published international application - A1
Search/Exam
Aug 11, 2011
May 24, 2011
May 24, 2011
May 24, 2011
Mar 21, 2011
Abstract
PCTISA
Mar 21, 2011
Claims
PCTISA
Mar 21, 2011
Description
PCTISA
Mar 21, 2011
Drawings
PCTISA