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The patent EP2573400 was granted to Kaeser Kompressoren on Oct 13, 2021. The application was filed on Dec 23, 2009 under application number EP12198935A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 |
|---|---|---|---|
| ATLAS COPCO | Jul 15, 2022 | IPLODGE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP1344935 |
| OPPOSITION | SE521518 |
| OPPOSITION | US6233954 |
| OPPOSITION | US6599094 |
| SEARCH | US2003065423 |
| SEARCH | US5343384 |
| SEARCH | WO03095841 |
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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Dec 10, 2025
Nov 27, 2025
Nov 27, 2025
Nov 14, 2025
Nov 11, 2025
(Electronic) Receipt
Appeal
Nov 11, 2025
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(Electronic) Receipt
Appeal
Oct 21, 2025
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Oct 15, 2025
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(Electronic) Receipt
Appeal
Jun 24, 2025
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Apr 18, 2025
(Electronic) Receipt
Appeal
Apr 18, 2025
Apr 18, 2025
Reply to appeal
Appeal
Apr 7, 2025
Apr 2, 2025
(Electronic) Receipt
Appeal
Apr 2, 2025
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Reply to appeal
Appeal
Dec 18, 2024
Dec 18, 2024
Dec 13, 2024
(Electronic) Receipt
Appeal
Dec 13, 2024
Dec 13, 2024
Nov 27, 2024
(Electronic) Receipt
Appeal
Nov 27, 2024
Nov 27, 2024
Oct 21, 2024
Oct 21, 2024
Oct 14, 2024
(Electronic) Receipt
Appeal
Oct 14, 2024
(Electronic) Receipt
Appeal
Oct 14, 2024
Oct 14, 2024
Oct 14, 2024
Notice of appeal
Appeal
Oct 14, 2024
Notice of appeal
Appeal
Aug 14, 2024
Aug 14, 2024
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Means of redress
OPPO
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Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
Description
OPPO
May 10, 2024
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Oct 26, 2021
Sep 16, 2021
Decision to grant a European patent
Search/Exam
Sep 2, 2021
(Electronic) Receipt
Search/Exam
Sep 2, 2021
English translation of the claims
Search/Exam
Sep 2, 2021
Filing of the translations of the claims
Search/Exam
Sep 2, 2021
French translation of claims
Search/Exam
Sep 2, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 22, 2021
Apr 22, 2021
Apr 22, 2021
Intention to grant (signatures)
Search/Exam
Apr 22, 2021
Text intended for grant (clean copy)
Search/Exam
Apr 22, 2021
Nov 25, 2020
(Electronic) Receipt
Search/Exam
Nov 25, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 25, 2020
May 29, 2020
Annex to the communication
Search/Exam
May 29, 2020
Communication from the Examining Division
Search/Exam
Mar 4, 2019
(Electronic) Receipt
Search/Exam
Mar 4, 2019
Amended claims with annotations
Search/Exam
Mar 4, 2019
Amended description with annotations
Search/Exam
Mar 4, 2019
Claims
Search/Exam
Mar 4, 2019
Description
Search/Exam
Mar 4, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 4, 2019
Nov 29, 2018
Annex to the communication
Search/Exam
Nov 29, 2018
Communication from the Examining Division
Search/Exam
Nov 15, 2018
Examination started
Search/Exam
Jul 5, 2018
(Electronic) Receipt
Search/Exam
Jul 5, 2018
Letter accompanying subsequently filed items
Search/Exam
Jul 5, 2018
Priority search results
Search/Exam
Jul 5, 2018
Jun 6, 2018
Refund of fees
Search/Exam
Jun 1, 2018
May 22, 2018
(Electronic) Receipt
Search/Exam
May 22, 2018
May 22, 2018
Amended claims with annotations
Search/Exam
May 22, 2018
Amendments received before examination
Search/Exam
May 22, 2018
Letter accompanying subsequently filed items
Search/Exam
Nov 27, 2017
Nov 3, 2017
Refund of fees
Search/Exam
Oct 20, 2017
Oct 20, 2017
European search opinion
Search/Exam
Oct 20, 2017
European search report
Search/Exam
Oct 20, 2017
Information on Search Strategy
Search/Exam
Oct 6, 2017
Search started
Search/Exam
Jun 10, 2016
Submission concerning representation
Search/Exam
Jun 10, 2016
Submission concerning representation
Search/Exam
Aug 28, 2014
Aug 22, 2014
Jul 23, 2014
Refund of fees
Search/Exam
Jul 16, 2014
Apr 30, 2014
Annexes in respect of a client data request
Search/Exam
Apr 30, 2014
Payment of fees and costs
Search/Exam
Apr 30, 2014
Feb 27, 2013
Notification of forthcoming publication
Search/Exam
Feb 21, 2013
Modified abstract
Search/Exam
Feb 13, 2013
Communication to designated inventor
Search/Exam
Dec 21, 2012
Abstract
Search/Exam
Dec 21, 2012
Dec 21, 2012
Annex
Search/Exam
Dec 21, 2012
Claims
Search/Exam
Dec 21, 2012
Description
Search/Exam
Dec 21, 2012
Designation of inventor
Search/Exam
Dec 21, 2012
Drawings
Search/Exam
Dec 21, 2012
Request for grant of a European patent
Search/Exam
Dec 21, 2012
Submission concerning representation
Search/Exam
Jul 22, 2010