Patents by Inventor Ryo Kojima

Ryo Kojima 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 of quantitative assay for 1,5-anhydroglucitol
    Patent number: 5486458
    Abstract: There is provided a method of quantitative assay for 1,5-anhydroglucitol in a specimen characterized by effectively removing maltose present in the specimen using .alpha.-glucosidase. Maltose present in a specimen is previously converted into glucose by the action of .alpha.-glucosidase derived from a microorganism belonging to the genus Bacillus to remove the affect by maltose. Then 1,5-anhydroglucitol in the specimen is quantitatively determined.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: January 23, 1996
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Ryo Kojima, Yoshiro Sato, Takeshi Nagasawa
  • Method of quantitative assay for 1,5-anhydroglucitol
    Patent number: 5468621
    Abstract: A quantitative assay for 1,5-anhydroglucitol in a specimen is described. This assay comprises treating a specimen with a phosphorylating enzyme in the presence of 5 to 500 mM adenosine-5'-triphosphate in a pH range of 7.2 to 8.5, to selectively eliminate sugars other than 1,5-anhydroglucitol, and reacting the product of this reaction, without removing the residual ATP, with pyranose oxidase in the above pH range. This assay is quite rapid and suitable for performance using an automated device.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: November 21, 1995
    Assignee: Nitto Boseki Co., Ltd.
    Inventors: Ryo Kojima, Yoshiro Sato, Takeshi Nagasawa