Patent No. EP2593288 (titled "Apparatus And Process For Producing Products From Pigment-Containing Polymer Mixtures") was filed by Bayer on Jul 13, 2011. The application was issued on Apr 16, 2025.

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 |
|---|---|---|
| EXTRICOM EXTRUSION | Jul 11, 2018 | LS MP VON PUTTKAMER BERNGRUBER LOTH SPUHLER |
| COPERION | Jul 10, 2018 | RAU |
| INEOS STYROLUTION GROUP | Jul 5, 2018 | JACOBI |
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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