Pigment Dispersant, Production Method For Pigment Dispersant, And Pigment Dispersion Liquid

Patent No. EP2933297 (titled "Pigment Dispersant, Production Method For Pigment Dispersant, And Pigment Dispersion Liquid") was filed by Dainichiseika Color & Chemicals MFG on Nov 26, 2013. The application was issued on May 10, 2017.

Patent Summary

A pigment dispersant for achieving high dispersion stability and fluidity in oil-based inks, paints, and coatings. The dispersant is a graft copolymer formed through living radical polymerization of specific monomers, comprising a main chain with an acidic or basic group and side chains derived from macromonomers with molecular weights of 500-5000. The polymerization is controlled to achieve a main chain molecular weight of 1700-4250 and a side chain proportion of 50-90 mass%. The dispersant enables high-performance pigment dispersion in a wide range of applications.

Patent Family

Patent Family

Patent Oppositions

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.

CompanyOpposition DateRepresentative
SPECHTFeb 7, 2018MULLER BORE & PARTNER PATENTANWALTE PARTG MBB

Dossier Documents

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

EP2933297

DAINICHISEIKA COLOR & CHEMICALS MFG
Application Number
EP13861853A
Filing Date
Nov 26, 2013
Status
Opposition Rejected
Oct 11, 2019
Publication Date
May 10, 2017