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Patent No. EP3816231 (titled "Polyamide Resin Composition For Blow-Molded Products Exposed To High-Pressure Hydrogen, And Blow-Molded Product") was filed by Toray Industries on Jul 29, 2019. The application was issued on Aug 10, 2022.

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.
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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