Patents by Inventor Kazunari Hashidume

Kazunari Hashidume 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).

  • Urea derivatives
    Patent number: 5041636
    Abstract: Urea derivatives of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently a 4-disubstituted aminoaryl group or the like, and R.sup.3 is a carboxyalkyl group or the like, is soluble in water and effective as a color producing reagent for determining hydrogen peroxide or the like or the activity of peroxidase.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: August 20, 1991
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Yoshitsugu Sakata, Kazunari Hashidume, Tsutomu Iwata, Toyoharu Mukai, Masaaki Kida
  • Urea derivatives
    Patent number: 4879383
    Abstract: Urea derivatives of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently a 4-disubstituted aminoaryl group or the like, and R.sup.3 is a carboxyalkyl group or the like, is soluble in water and effective as a color producing reagent for determining hydrogen peroxide or the like or the activity of peroxidase.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: November 7, 1989
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Yoshitsugu Sakata, Kazunari Hashidume, Tsutomu Iwata, Toyoharu Mukai, Masaaki Kida