Patents by Inventor Yoshiharu Tokugawa

Yoshiharu Tokugawa 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).

  • Coating composition for providing water and blister resistant, ink-receptive paper
    Patent number: 4464505
    Abstract: A paper coating composition is described, containing a pigment and an aqueous binder as major components, and further containing a mixture of a reaction product between (a) at least one alkylenediamine or polyalkylenepolyamine and (b) epihalohydrin, and (Y) a water-soluble resin obtained by reacting urea, polyalkylenepolyamine, and dibasic carboxylic acid and reacting the resulting polyamidopolyurea with formaldehyde, or containing these reaction products.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: August 7, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shigenao Kawakami, Terumasa Saka, Shigeru Ura, Mikio Iwata, Yoshiharu Tokugawa, Naoyoshi Jinno
  • Preparation of liquid TDI for compositions
    Patent number: 4055585
    Abstract: A urethane composition comprising as a base compound a polyol and/or an isocyanate-reactive tar, and as a curing agent a liquid product of a toluene diisocyanate tar occurring as a by-product in the preparation of toluene diisocyanate obtained by dissolving or dispersing the toluene diisocyanate tar in an aromatic solvent having a boiling point at atmospheric pressure of at least 200.degree. C and a method for producing the liquid toluene diisocyanate tar product.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: October 25, 1977
    Assignees: Sumitomo Chemical Company, Limited, Nittetsu Chemical Industrial Co., Ltd.
    Inventors: Masahiro Okamoto, Makoto Nemoto, Yushin Kataoka, Yoshiharu Tokugawa
  • Tar urethane composition
    Patent number: 4000099
    Abstract: A urethane composition comprising as a base compound a polyol and/or an isocyanate-reactive tar, and as a curing agent a liquid product of a toluene diisocyanate tar occurring as a by-product in the preparation of toluene diisocyanate obtained by dissolving or dispersing the toluene diisocyanate tar in an aromatic solvent having a boiling point at atmospheric pressure of at least 200.degree. C and a method for producing the liquid toluene diisocyanate tar product.
    Type: Grant
    Filed: May 15, 1974
    Date of Patent: December 28, 1976
    Assignees: Sumitomo Chemical Company, Limited, Nittetsu Chemical Industrial Co., Ltd.
    Inventors: Makato Nemoto, Yoshiharu Tokugawa