Patents by Inventor Motokazu Suyama

Motokazu Suyama 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).

  • Process for producing a copper phthalocyanine compound
    Patent number: 5153314
    Abstract: A process for producing a copper phthalocyanine compound, which comprises heating and reacting phthalic acid or a phthalic acid derivative, urea or a urea derivative and cuprous chloride in the presence of a catalyst in an inert organic solvent, wherein the cuprous chloride is used in an amount of from 95 to 99% of the stoichiometric amount relative to the phthalic acid or the phthalic acid derivative.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: October 6, 1992
    Assignee: Kawasaki Kasei Chemicals Ltd.
    Inventors: Tomio Segawa, Kazuhiro Maruyama, Tadashi Ninomiya, Motokazu Suyama
  • Process for producing a metal phthalocyanine and/or its derivative
    Patent number: 4906747
    Abstract: In a process for producing a metal phthalocyanine and/or its derivative by heating phthalic anhydride and/or its derivative, urea and a metal compound in an organic solvent in the presence of a catalyst, or by heating phthalodinitrile and a metal or a metal compound in an organic solvent, the improvement wherein the reaction for the production of the metal phthalocyanine and/or its derivative is conducted by an addition of cyanuric acid and/or its derivative.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: March 6, 1990
    Assignee: Kawasaki Kasei Chemicals Ltd.
    Inventors: Tomio Segawa, Kazuhiro Maruyama, Tadashi Ninomiya, Motokazu Suyama