Patent No. EP3330331 (titled "Antifouling Coating Material Composition, Antifouling Coating Film, Antifouling Substrate, Rosin Compound For Antifouling Coating Material Composition, And Method For Manufacturing Antifouling Coating Material Composition") was filed by Chugoku Marine Paints on Jul 29, 2016. The application was issued on Sep 2, 2020.

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.
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