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The patent EP2778412 was granted to Kaeser Kompressoren on Dec 25, 2019. The application was filed on Mar 15, 2013 under application number EP13159616A. 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 | Sep 25, 2020 | VO | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2010072803 |
| OPPOSITION | CA2842914 |
| OPPOSITION | US2003097243 |
| OPPOSITION | US2007005805 |
| OPPOSITION | US2012029706 |
| SEARCH | DE102005006410 |
| SEARCH | DE102008064491 |
| SEARCH | DE102011079732 |
| SEARCH | DE19826169 |
| SEARCH | EP1672454 |
| SEARCH | US2003097243 |
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 5, 2025
Dec 5, 2025
Oct 16, 2025
Oct 16, 2025
Oct 15, 2025
Oct 15, 2025
Oct 13, 2025
Oct 13, 2025
Oct 10, 2025
(Electronic) Receipt
Appeal
Oct 10, 2025
Oct 10, 2025
Aug 26, 2025
Aug 21, 2025
(Electronic) Receipt
Appeal
Aug 21, 2025
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Mar 31, 2025
Mar 27, 2025
(Electronic) Receipt
Appeal
Mar 27, 2025
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Mar 19, 2025
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(Electronic) Receipt
Appeal
Aug 20, 2024
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May 27, 2024
May 22, 2024
(Electronic) Receipt
Appeal
May 22, 2024
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May 15, 2024
(Electronic) Receipt
Appeal
May 15, 2024
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Apr 19, 2024
Apr 16, 2024
(Electronic) Receipt
Appeal
Apr 16, 2024
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Mar 4, 2024
Feb 28, 2024
(Electronic) Receipt
Appeal
Feb 28, 2024
Feb 28, 2024
Feb 6, 2024
Feb 1, 2024
(Electronic) Receipt
Appeal
Feb 1, 2024
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Reply to appeal
Appeal
Sep 25, 2023
Sep 19, 2023
(Electronic) Receipt
Appeal
Sep 19, 2023
Sep 19, 2023
Jul 25, 2023
Jul 25, 2023
Jul 18, 2023
(Electronic) Receipt
Appeal
Jul 18, 2023
Jul 18, 2023
Notice of appeal
Appeal
May 23, 2023
May 19, 2023
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Means of redress
OPPO
May 19, 2023
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Refund of fees
OPPO
Mar 22, 2023
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Sep 25, 2020
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Jan 3, 2020
Nov 28, 2019
Decision to grant a European patent
Search/Exam
Nov 15, 2019
Nov 15, 2019
Nov 15, 2019
Intention to grant (signatures)
Search/Exam
Nov 15, 2019
Text intended for grant (clean copy)
Search/Exam
Nov 15, 2019
Oct 25, 2019
(Electronic) Receipt
Search/Exam
Oct 25, 2019
English translation of the claims
Search/Exam
Oct 25, 2019
French translation of claims
Search/Exam
Oct 25, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 25, 2019
Jun 19, 2019
Jun 19, 2019
Jun 19, 2019
Intention to grant (signatures)
Search/Exam
Jun 19, 2019
Text intended for grant (clean copy)
Search/Exam
Jun 19, 2019
Mar 26, 2018
(Electronic) Receipt
Search/Exam
Mar 26, 2018
Amended claims with annotations
Search/Exam
Mar 26, 2018
Amended description with annotations
Search/Exam
Mar 26, 2018
Claims
Search/Exam
Mar 26, 2018
Description
Search/Exam
Mar 26, 2018
Letter accompanying subsequently filed items
Search/Exam
Mar 26, 2018
Jan 26, 2018
Jan 23, 2018
(Electronic) Receipt
Search/Exam
Jan 23, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 23, 2018
Sep 14, 2017
Annex to the communication
Search/Exam
Sep 14, 2017
Communication from the Examining Division
Search/Exam
Sep 8, 2017
Examination started
Search/Exam
May 26, 2017
Jun 10, 2016
Submission concerning representation
Search/Exam
Jun 10, 2016
Submission concerning representation
Search/Exam
Jun 23, 2015
Decision to allow further processing
Search/Exam
Jun 12, 2015
(Electronic) Receipt
Search/Exam
Jun 12, 2015
Jun 12, 2015
Amended claims with annotations
Search/Exam
Jun 12, 2015
Letter accompanying subsequently filed items
Search/Exam
Jun 12, 2015
Payment of fees and costs
Search/Exam
Jun 12, 2015
Request for further processing
Search/Exam
Apr 21, 2015
Mar 11, 2015
Letter concerning fees and payments
Search/Exam
Mar 11, 2015
Payment of fees and costs
Search/Exam
Sep 22, 2014
Aug 28, 2014
Aug 22, 2014
Aug 20, 2014
Notification of forthcoming publication
Search/Exam
Apr 29, 2014
Payment of fees and costs
Search/Exam
Apr 28, 2014
Payment of fees and costs
Search/Exam
Mar 26, 2014
Refund of fees
Search/Exam
Mar 18, 2014
Mar 5, 2014
Mar 5, 2014
Feb 12, 2014
Submission concerning representation
Search/Exam
Jan 21, 2014
Annexes in respect of a client data request
Search/Exam
Jan 21, 2014
Payment of fees and costs
Search/Exam
Jan 21, 2014
Dec 16, 2013
Communication to designated inventor
Search/Exam
Dec 16, 2013
Communication to designated inventor
Search/Exam
Dec 16, 2013
Communication to designated inventor
Search/Exam
Dec 3, 2013
Designation of inventor
Search/Exam
Dec 3, 2013
Letter concerning the inventor
Search/Exam
Jun 14, 2013
Jun 14, 2013
European search opinion
Search/Exam
Jun 14, 2013
European search report
Search/Exam
Apr 18, 2013
Deficiency in designation of inventor
Search/Exam
Mar 27, 2013
Payment of fees and costs
Search/Exam
Mar 15, 2013
Abstract
Search/Exam
Mar 15, 2013
Mar 15, 2013
Claims
Search/Exam
Mar 15, 2013
Description
Search/Exam
Mar 15, 2013
Drawings
Search/Exam
Mar 15, 2013
Request for grant of a European patent
Search/Exam
Mar 15, 2013
Submission concerning representation
Search/Exam