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The patent EP2821651 was granted to Mitsubishi Heavy Industries Compressor on Jun 15, 2022. The application was filed on Feb 27, 2012 under application number EP12869730A. 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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| MAN ENERGY SOLUTIONS | May 27, 2019 | - | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2010203251 |
| INTERNATIONAL-SEARCH-REPORT | JP2010203251 |
| INTERNATIONAL-SEARCH-REPORT | JP2010236401 |
| INTERNATIONAL-SEARCH-REPORT | JP2011117402 |
| INTERNATIONAL-SEARCH-REPORT | JPH0893691 |
| OPPOSITION | CN101523056 |
| OPPOSITION | EP0900572 |
| OPPOSITION | EP2402618 |
| OPPOSITION | JP2006233901 |
| OPPOSITION | JP2011117402 |
| OPPOSITION | JPH08232893 |
| OPPOSITION | JPH0893691 |
| OPPOSITION | JPH10318191 |
| OPPOSITION | US4354802 |
| SEARCH | EP1593854 |
| SEARCH | EP2402618 |
| SEARCH | JP2006233901 |
| SEARCH | JP2011117402 |
| SEARCH | JPH08232893 |
| SEARCH | JPH0893691 |
| SEARCH | SU1211419 |
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 19, 2022
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Claims
OPPO
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Oct 29, 2018
Sep 20, 2018
Decision to grant a European patent
Search/Exam
Sep 7, 2018
(Electronic) Receipt
Search/Exam
Sep 7, 2018
Filing of the translations of the claims
Search/Exam
Sep 7, 2018
French translation of claims
Search/Exam
Sep 7, 2018
German translation of the claims
Search/Exam
Sep 7, 2018
Letter accompanying subsequently filed items
Search/Exam
Jun 26, 2018
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Intention to grant (signatures)
Search/Exam
Jun 26, 2018
Text intended for grant (clean copy)
Search/Exam
Jun 26, 2018
Feb 22, 2018
(Electronic) Receipt
Search/Exam
Feb 22, 2018
Amended description with annotations
Search/Exam
Feb 22, 2018
Description
Search/Exam
Feb 22, 2018
Letter accompanying subsequently filed items
Search/Exam
Feb 22, 2018
Nov 9, 2017
Annex to the communication
Search/Exam
Nov 9, 2017
Communication from the Examining Division
Search/Exam
Jul 5, 2017
(Electronic) Receipt
Search/Exam
Jul 5, 2017
Amended claims with annotations
Search/Exam
Jul 5, 2017
Claims
Search/Exam
Jul 5, 2017
Drawings
Search/Exam
Jul 5, 2017
Letter accompanying subsequently filed items
Search/Exam
Jul 5, 2017
Mar 9, 2017
Annex to the communication
Search/Exam
Mar 9, 2017
Communication from the Examining Division
Search/Exam
Nov 29, 2016
(Electronic) Receipt
Search/Exam
Nov 29, 2016
Amended claims with annotations
Search/Exam
Nov 29, 2016
Claims
Search/Exam
Nov 29, 2016
Letter accompanying subsequently filed items
Search/Exam
Nov 29, 2016
Jul 19, 2016
Annex to the communication
Search/Exam
Jul 19, 2016
Communication from the Examining Division
Search/Exam
Jul 12, 2016
Examination started
Search/Exam
Feb 16, 2016
(Electronic) Receipt
Search/Exam
Feb 16, 2016
Feb 16, 2016
Amended claims with annotations
Search/Exam
Feb 16, 2016
Feb 16, 2016
Amended description with annotations
Search/Exam
Feb 16, 2016
Amendments received before examination
Search/Exam
Feb 16, 2016
Letter accompanying subsequently filed items
Search/Exam
Nov 13, 2015
Oct 27, 2015
Oct 27, 2015
European search opinion
Search/Exam
Oct 27, 2015
Supplementary European search report
Search/Exam
Oct 15, 2015
Search started
Search/Exam
Dec 10, 2014
Notification of forthcoming publication
Search/Exam
Oct 6, 2014
Oct 1, 2014
Communication to designated inventor
Search/Exam
Oct 1, 2014
Communication to designated inventor
Search/Exam
Sep 26, 2014
Submission concerning representation
Search/Exam
Sep 16, 2014
Sep 16, 2014
Aug 7, 2014
(Electronic) Receipt
Search/Exam
Aug 7, 2014
Abstract
Search/Exam
Aug 7, 2014
Claims
Search/Exam
Aug 7, 2014
Description
Search/Exam
Aug 7, 2014
Drawings
Search/Exam
Aug 7, 2014
Request for entry into the European phase
Search/Exam
Jul 11, 2014
Information on entry into European phase
Search/Exam
Sep 6, 2013
Copy of the international search report
Search/Exam
Sep 6, 2013
Sep 6, 2013
International publication pamphlet
Search/Exam