Patents by Inventor Yoshihiko Hyosu

Yoshihiko Hyosu 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).

  • Fine spherical polymer particles containing inorganic pigment and/or coloring agent and process for the preparation thereof
    Patent number: 4314932
    Abstract: A suspension polymerization of polymerizable monomers is conducted in a system containing an inorganic dispersion stabilizer and an inorganic pigment and/or black coloring agent, in which the polymerizable monomers have an opposite charge in water to the inorganic dispersion stabilizer whereby the former is ionically bound with the latter. The suspension polymerization during the middle stage in which polymer particles are apt to stick together is stabilized and the polymer particles are prevented from coalescing so that fine spherical polymer particles are obtained with a uniform particle size distribution.Also, the suspension polymerization is conducted having liquid resins involved in polymerizable monomers thereby to obtain non-sticky, free flowing particles. These particles adhere to paper sheets by mechnically smashing.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: February 9, 1982
    Assignee: Sinloihi Company Limited
    Inventors: Saburo Wakimoto, Sadayasu Miyahara, Yoshihiko Hyosu
  • Fine spherical polymer particles containing inorganic pigment and/or coloring agent and process for the preparation thereof
    Patent number: 4269760
    Abstract: A suspension polymerization of polymerizable monomers is conducted in a system containing an inorganic dispersion stabilizer and an inorganic pigment and/or black coloring agent, in which the polymerizable monomers have an opposite charge in water to the inorganic dispersion stabilizer whereby the former is ionically bound with the latter. The suspension polymerization during the middle stage in which polymer particles are apt to stick together is stabilized and the polymer particles are prevented from coalescing so that fine spherical polymer particles are obtained with a uniform particle size distribution.Also, the suspension polymerization is conducted having liquid resins involved in polymerizable monomers thereby to obtain non-sticky, free flowing particles. These particles adhere to paper sheets by mechanically smashing.
    Type: Grant
    Filed: July 13, 1979
    Date of Patent: May 26, 1981
    Assignee: Sinloihi Company Limited
    Inventors: Saburo Wakimoto, Sadayasu Miyahara, Yoshihiko Hyosu
  • Fluorescent colored resin particles and process for preparation thereof
    Patent number: 4016133
    Abstract: Colored resin particles which are colored uniformly and densely and are excellent in fluorescence, light fastness and washing resistance are prepared by copolymerizing in an aqueous medium in the presence of a water-soluble fluorescent dye (1) a polymerizable unsaturated monomer A having a low affinity for the fluorescent dye, (2) a polymerizable unsaturated monomer B having at least one cyano group and (3) a polymerizable unsaturated monomer C having a high affinity for the fluorescent dye and being insoluble or barely soluble in water, which is represented by the following general formula ##STR1## wherein X is a hydrogen atom or a methyl group.
    Type: Grant
    Filed: September 3, 1975
    Date of Patent: April 5, 1977
    Assignee: Sinloihi Co.
    Inventors: Yoshihiko Hyosu, Eiiti Miyashita, Noboru Kuzuba, Sadayasu Miyahara, Ryoshiro Takano