Patent No. EP2277970 (titled "Fluorinated Alkene Refrigerant Compositions") was filed by Honeywell on Oct 25, 2004. The application was issued on Mar 15, 2017.

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 |
|---|---|---|
| DAIKIN INDUSTRIES | Dec 15, 2017 | HOFFMANN EITLE |
| MEXICHEM FLUOR DE CV | Dec 14, 2017 | POTTER CLARKSON |
| ACEA EUROPEAN AUTOMOBILE MANUFACTURERS ASSOCIATION | Dec 13, 2017 | WALLINGER RICKER SCHLOTTER TOSTMANN |
| BAYERISCHE MOTOREN WERKE | Dec 13, 2017 | TOSTMANN |
| ASAHI GLASS | Dec 12, 2017 | MULLER BORE & PARTNER PATENTANWALTE PARTG MBB |
| ARKEMA FRANCE | Mar 15, 2017 | BANDPAY & GREUTER |
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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