Patents by Inventor Sho SHIBUSAWA

Sho SHIBUSAWA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aqueous dispersion of colored particles
    Patent number: 11718758
    Abstract: Provided is an aqueous dispersion of colored particles suitable for colorants for writing instrument inks, inkjet inks, painting materials, aqueous coatings, and the like. The aqueous dispersion of colored particles includes a polymer having at least a unit of a monomer derived from a dye having a polymerizable unsaturated group. The monomer derived from the dye is preferably derived from the compound represented by General Formula (1) below: where Dye represents a dye residue, R1 represents a hydrogen atom or a methyl group, Y2 represents —O— or —NR10—, where R10 represents a hydrogen atom or an alkyl group, A1 represents an alkylene group which is unsubstituted or substituted by at least one group selected from —OCO—, —COO—, —NHCONH—, and the like in the chain thereof and/or at the terminal thereof, and/or a hydroxy group.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: August 8, 2023
    Assignee: MITSUBISHI PENCIL COMPANY, LIMITED
    Inventors: Hisato Haga, Tetsuji Murase, Sho Shibusawa, Tomoaki Horie
  • AQUEOUS DISPERSION OF COLORED PARTICLES
    Publication number: 20210071006
    Abstract: Provided is an aqueous dispersion of colored particles suitable for colorants for writing instrument inks, inkjet inks, painting materials, aqueous coatings, and the like. The aqueous dispersion of colored particles includes a polymer having at least a unit of a monomer derived from a dye having a polymerizable unsaturated group. The monomer derived from the dye is preferably derived from the compound represented by General Formula (1) below: where Dye represents a dye residue, R1 represents a hydrogen atom or a methyl group, Y2 represents —O— or —NR10—, where R10 represents a hydrogen atom or an alkyl group, A1 represents an alkylene group which is unsubstituted or substituted by at least one group selected from —OCO—, —COO—, —NHCONH—, and the like in the chain thereof and/or at the terminal thereof, and/or a hydroxy group.
    Type: Application
    Filed: December 11, 2018
    Publication date: March 11, 2021
    Applicants: MITSUBISHI PENCIL COMPANY, LIMITED, FUJIFILM WAKO PURE CHEMICAL CORPORATION
    Inventors: Hisato HAGA, Tetsuji MURASE, Sho SHIBUSAWA, Tomoaki HORIE