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The patent EP3134649 was granted to Kaeser Kompressoren on Dec 14, 2022. The application was filed on Apr 27, 2015 under application number EP15736405A. 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 |
|---|---|---|---|
| ATLAS COPCO | Jan 4, 2019 | VO | ADMISSIBLE |
| GARDNER DENVER DEUTSCHLAND | Jan 3, 2019 | MURGITROYD | ADMISSIBLE |
| INGERSOLL RAND INDUSTRIAL | Jan 3, 2019 | MURGITROYD | ADMISSIBLE |
| ROTORCOMP VERDICHTER | Dec 28, 2018 | HERING | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE1428265 |
| INTERNATIONAL-SEARCH-REPORT | US2622787 |
| INTERNATIONAL-SEARCH-REPORT | WO9721926 |
| OPPOSITION | CN102352840 |
| OPPOSITION | DE1428265 |
| OPPOSITION | DE19539002 |
| OPPOSITION | DE2911415 |
| OPPOSITION | DE3230720 |
| OPPOSITION | DE3246685 |
| OPPOSITION | FR953057 |
| OPPOSITION | GB627162 |
| OPPOSITION | KR100313638B |
| OPPOSITION | US2622787 |
| OPPOSITION | US3138110 |
| OPPOSITION | US3275226 |
| OPPOSITION | US3282495 |
| OPPOSITION | US4350480 |
| OPPOSITION | WO9721926 |
| OTHER | US2622787 |
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.
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Notification of the recording of a change
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Published international application - A2
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PCTRO
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Abstract
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Description
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