Patents by Inventor Junichi Kumabe

Junichi Kumabe 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).

  • Colored polypropylene resin
    Patent number: 4826898
    Abstract: A colored polypropylene resin comprising a polypropylene resin, a carbon black pigment and a copper phthalocyanine pigment, said colored polypropylene resin further comprising 0.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: May 2, 1989
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Takumi Hirosawa, Yuzo Hirayama, Keiki Sagara, Mituhiro Isomichi, Junichi Kumabe
  • Coloring compositions of powder form
    Patent number: 4020040
    Abstract: A coloring composition of powder form comprising (a) a pigment, (b) a vinyl chloride copolymer of an average degree of polymerization of 100 - 2000 and in which the other monomer copolymerized with vinyl chloride is contained in a proportion of not more than 60 weight parts per 100 weight parts of vinyl chloride, and (c) a resin whose viscosity in a 40 weight % dimethylformamide solution is 80 - 7500 centipoises.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: April 26, 1977
    Assignee: Dainippon Ink and Chemicals, Incorporated
    Inventors: Tsutomu Kattoh, Junichi Kumabe, Satoshi Hirabayashi