Patent No. EP4113653 (titled "Dispersant Composition For Electrochemical Element, Electroconductive Material Dispersion For Electrochemical Element, Slurry Composition For Electrochemical Element Electrode And Method For Manufacturing Same, Electrode For Electrochemical Element, And Electrochemical Element") was filed by Zeon on Aug 26, 2021. The application was issued on Nov 27, 2024.
A dispersant composition for electrochemical devices comprising a polymer with a nitrile group-containing monomer unit and an alkylene structural unit, wherein the polymer has a volume-average particle diameter D50 of not less than 50 nm and not more than 800 nm, and one or more peaks are detected in a particle diameter range of not less than 5 µm and not more than 30 µm. The polymer is produced by hydrogenating a conjugated diene monomer unit in a polymerization reaction. The dispersant composition is used to produce a slurry composition for electrochemical device electrodes with improved dispersion stability and enhanced electrochemical performance.

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.
Date
Description
Get instant alerts for new documents