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The patent EP3055570 was granted to Kaeser Kompressoren on Nov 4, 2020. The application was filed on Oct 1, 2014 under application number EP14781142A. 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 11, 2020 | VO | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE102005006410 |
| INTERNATIONAL-SEARCH-REPORT | DE102008064491 |
| INTERNATIONAL-SEARCH-REPORT | DE102011079732 |
| INTERNATIONAL-SEARCH-REPORT | DE19826169 |
| OPPOSITION | CA2344908 |
| OPPOSITION | DE102005006410 |
| OPPOSITION | DE102008064491 |
| OPPOSITION | DE102011079732 |
| OPPOSITION | DE19826169 |
| OPPOSITION | EP1672454 |
| OPPOSITION | EP1731857 |
| OPPOSITION | JP2005241089 |
| OPPOSITION | US2002127120 |
| OPPOSITION | US2003097243 |
| OPPOSITION | US2009183519 |
| OPPOSITION | US2012215509 |
| OPPOSITION | US2013019125 |
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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Nov 26, 2025
Nov 26, 2025
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Sep 11, 2025
Sep 11, 2025
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(Electronic) Receipt
Appeal
May 13, 2025
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(Electronic) Receipt
Appeal
Apr 7, 2025
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Dec 30, 2024
(Electronic) Receipt
Appeal
Dec 30, 2024
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Dec 10, 2024
(Electronic) Receipt
Appeal
Dec 10, 2024
Dec 10, 2024
Nov 28, 2024
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Mar 5, 2024
Feb 29, 2024
(Electronic) Receipt
Appeal
Feb 29, 2024
Feb 29, 2024
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Feb 29, 2024
Claims
Appeal
Feb 29, 2024
Feb 29, 2024
Jan 16, 2024
Jan 9, 2024
(Electronic) Receipt
Appeal
Jan 9, 2024
Jan 9, 2024
Nov 16, 2023
Nov 13, 2023
(Electronic) Receipt
Appeal
Nov 13, 2023
Nov 13, 2023
Nov 13, 2023
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Sep 15, 2023
Sep 11, 2023
(Electronic) Receipt
Appeal
Sep 11, 2023
Sep 11, 2023
Reply to appeal
Appeal
Sep 7, 2023
Sep 4, 2023
(Electronic) Receipt
Appeal
Sep 4, 2023
Sep 4, 2023
Reply to appeal
Appeal
May 9, 2023
May 9, 2023
May 2, 2023
(Electronic) Receipt
Appeal
May 2, 2023
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Claims
Appeal
May 2, 2023
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Apr 28, 2023
(Electronic) Receipt
Appeal
Apr 28, 2023
Apr 28, 2023
Mar 24, 2023
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Mar 6, 2023
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Mar 1, 2023
(Electronic) Receipt
Appeal
Mar 1, 2023
Mar 1, 2023
Notice of appeal
Appeal
Feb 24, 2023
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Feb 20, 2023
(Electronic) Receipt
Appeal
Feb 20, 2023
Notice of appeal
Appeal
Dec 27, 2022
Dec 23, 2022
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Means of redress
OPPO
Dec 23, 2022
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Sep 18, 2020
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Sep 11, 2020
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Aug 31, 2020
Jun 22, 2020
(Electronic) Receipt
Search/Exam
Jun 22, 2020
Annex
Search/Exam
Jun 22, 2020
Annex
Search/Exam
Jun 22, 2020
Annex
Search/Exam
Jun 22, 2020
Annex
Search/Exam
Jun 22, 2020
Annex
Search/Exam
Jun 22, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 22, 2020
Matter concerning the application
Search/Exam
May 15, 2020
Matter currently under investigation
Search/Exam
Mar 10, 2020
(Electronic) Receipt
Search/Exam
Mar 10, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 10, 2020
Letter concerning the inventor
Search/Exam
Mar 10, 2020
Request for correction of the publication
Search/Exam
Dec 20, 2019
Nov 14, 2019
Decision to grant a European patent
Search/Exam
Sep 20, 2019
(Electronic) Receipt
Search/Exam
Sep 20, 2019
English translation of the claims
Search/Exam
Sep 20, 2019
Filing of the translations of the claims
Search/Exam
Sep 20, 2019
French translation of claims
Search/Exam
Sep 20, 2019
Letter accompanying subsequently filed items
Search/Exam
May 23, 2019
May 23, 2019
May 23, 2019
Intention to grant (signatures)
Search/Exam
May 23, 2019
Text intended for grant (clean copy)
Search/Exam
May 23, 2019
Apr 12, 2019
(Electronic) Receipt
Search/Exam
Apr 12, 2019
Amended claims with annotations
Search/Exam
Apr 12, 2019
Amended description with annotations
Search/Exam
Apr 12, 2019
Claims
Search/Exam
Apr 12, 2019
Description
Search/Exam
Apr 12, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 12, 2019
Feb 22, 2019
Feb 19, 2019
(Electronic) Receipt
Search/Exam
Feb 19, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 19, 2019
Oct 9, 2018
Annex to the communication
Search/Exam
Oct 9, 2018
Communication from the Examining Division
Search/Exam
Oct 1, 2018
Examination started
Search/Exam
Mar 3, 2017
(Electronic) Receipt
Search/Exam
Mar 3, 2017
Mar 3, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 3, 2017
Jan 10, 2017
Nov 28, 2016
(Electronic) Receipt
Search/Exam
Nov 28, 2016
Nov 28, 2016
Amended claims with annotations
Search/Exam
Nov 28, 2016
Nov 28, 2016
Amended description with annotations
Search/Exam
Nov 28, 2016
Amendments received before examination
Search/Exam
Nov 28, 2016
Letter accompanying subsequently filed items
Search/Exam
Jul 20, 2016
Jun 10, 2016
Submission concerning representation
Search/Exam
Jun 10, 2016
Submission concerning representation
Search/Exam
May 18, 2016
May 13, 2016
Communication to designated inventor
Search/Exam
Apr 28, 2016
Mar 23, 2016
(Electronic) Receipt
Search/Exam
Mar 23, 2016
Request for entry into the European phase
Search/Exam
Feb 19, 2016
Information on entry into European phase
Search/Exam
May 6, 2015
Apr 16, 2015
Copy of the international search report
Search/Exam
Apr 16, 2015
Copy of the international search report
Search/Exam
Apr 16, 2015
Published international application - A1
Search/Exam
Feb 6, 2015
Feb 6, 2015
Feb 6, 2015
Oct 21, 2014
Oct 1, 2014
(Electronic) Receipt
PCTRO
Oct 1, 2014
Abstract
PCTRO
Oct 1, 2014
Claims
PCTRO
Oct 1, 2014
Description
PCTRO
Oct 1, 2014
Drawings
PCTRO
Oct 1, 2014