Patent No. EP2676976 (titled "Emulsion Polymers With Improved Wet Scrub Resistance Having One Or More Silicon Containing Compounds") was filed by Celanese Emulsions on Jun 4, 2013. The application was issued on Jul 11, 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 |
|---|---|---|
| BASF | Sep 30, 2015 | BASF ASSOCIATION |
| EVONIK OPERATIONS | Sep 30, 2015 | POLYPATENT BGL |
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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