Patent No. EP2588528 (titled "Oxygen Scavenging Plastic Material") was filed by Avient Colorants Italy on Jun 16, 2011. The application was issued on Jan 3, 2018.

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 |
|---|---|---|
| APG POLYTECH | Sep 27, 2018 | HOFFMANN EITLE |
| COLORMATRIX EUROPE LTDCOLORMATRIX EUROPE BVPOLYO NE CORPPOLYONE LUX SARLPOLYONE | Sep 24, 2018 | APPLEYARD LEES |
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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