Patents by Inventor Masayuki Futatsugi

Masayuki Futatsugi 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).

  • Method for measuring LDL-cholesterol
    Patent number: 5925534
    Abstract: The amount of cholesterol in low density lipoproteins in a sample can be measured by contacting the sample with one or more reagent solutions to carry out the reaction in the presence of a polyanion and an amphoteric surfactant, followed by optical measurement of the reaction product.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: July 20, 1999
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Yutaka Miki, Isao Koyama, Nobuko Imajo, Masayuki Futatsugi, Toshiro Hanada
  • Reagent and methods for measuring LDL-cholesterol
    Patent number: 5879901
    Abstract: The present invention provides a method for measuring an amount of LDL-cholesterol in samples specifically and accurately and also a reagent used for the method, and by using the present invention, such effect can be attained that LDL-cholesterol can be measured directly using so far widely used automatic analyzer, which has been impossible in known measurement methods.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: March 9, 1999
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Masayuki Futatsugi, Ikuko Tanaka
  • Heat-stable and water soluble modified enzymes
    Patent number: 5834273
    Abstract: A modified enzyme obtained by modifying an enzyme such as a hydrogen peroxide-generating enzyme, ascorbate oxidase, etc. with a polysaccharide, polyamino acid or synthetic polymer having a plurality of carboxyl groups via a crosslinking agent capable of binding both carboxyl group and amino group is remarkably improved in resistance to heat, proteases, etc. and in storage stability in an aqueous solution.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: November 10, 1998
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Masayuki Futatsugi, Kenji Gushi