Patents by Inventor Kazunari Hashizume

Kazunari Hashizume 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).

  • Oxidizable color producing reagent
    Patent number: 5238818
    Abstract: This amount of an oxidative substance or a peroxidase-like substance can be determined by using a combined color former comprising 4-aminoantipyrine or a derivative thereof, etc., as a main color former and a p-fluoroaniline derivative or a salt thereof as a color producing component.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: August 24, 1993
    Assignee: Wako Pure Chemicals Co., Ltd.
    Inventors: Kazunari Hashizume, Haruhiko Sugiyama, Mutsuhiro Date
  • Oxidizable color producing reagent
    Patent number: 5164512
    Abstract: A triarylimidazole derivative of the formula: ##STR1## wherein X is O or S; Y is an arylsulfonyl group, an alkyl group, etc.; R.sup.2, R.sup.3 and R.sup.4 are independently an aryl group, etc., is stable in water or a buffer solution, high in measuring sensitivity and is suitable as an oxidizable color producing reagent for determining hydrogen peroxide, etc. generated by enzymatic reaction in a living body sample.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: November 17, 1992
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Kazunari Hashizume, Haruhiko Sugiyama