Patents by Inventor Shobu Shioji

Shobu Shioji 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).

  • Method for production of aqueous dispersion of inorganic pigment
    Patent number: 4892902
    Abstract: A method for the production of an aqueous dispersion by the dispersion of an inorganic pigment such as calcium carbonate and aluminum hydroxide in an aqueous medium, which method comprises incorporating in said inorganic pigment as a dispersant a carboxyl group-containing water-soluble polymer possessing a number average molecular weight in the range of 2,000 to 80,000 and/or a water-soluble condensed phospate and a water-soluble anionic modified polyvinyul alcohol possessing a polymerization degree in the range of 30 to 700, a saponification degree in the range of 30 to 100 mol %, and an anionic modification degree in the range of 0.5 to 20 mol %.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: January 9, 1990
    Assignee: Nippon Shokubai Kagaku, Co., Ltd.
    Inventors: Shobu Shioji, Masazumi Sasabe, Yorimichi Dairoku, Teruaki Fujiwara
  • Method for production of aqueous dispersion of inorganic pigment
    Patent number: 4818783
    Abstract: A method for the production of an aqueous dispersion by the dispersion of an inorganic pigment such as calcium carbonate and aluminum hydroxide in an aqueous medium, which method comprises incorporating in said inorganic pigment as a dispersant a carboxyl group-containing water-soluble polymer possessing a number average molecular weight in the range of 2,000 to 80,000 and/or a water-soluble condensed phosphate and a water-soluble anionic modified polyvinyl alcohol possessing a polymerization degree in the range of 30 to 700, a saponification degree in the range of 30 to 100 mol %, and an anionic modification degree in the range of 0.5 to 20 mol %.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: April 4, 1989
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Shobu Shioji, Masazumi Sasabe, Yorimichi Dairoku, Teruaki Fujiwara