Patents by Inventor Kimiyasu Sakamoto

Kimiyasu Sakamoto 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).

  • Readily soluble 2',3'-dideoxyinosine compositions
    Patent number: 5399554
    Abstract: A readily soluble 2',3'-dideoxyinosine composition is prepared by combining 80 to 1 parts by weight of a basic amino acid and 20 to 99 parts by weight of 2',3'-dideoxyinosine. The greater solution velocity of this composition improves solubility for therapeutic uses.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: March 21, 1995
    Assignee: Ajinomoto Co., Inc.
    Inventors: Kimiyasu Sakamoto, Toshihide Yukawa
  • Method of preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester
    Patent number: 5266719
    Abstract: In neutralizing an acid addition salt of .alpha.-APM in an aqueous medium, the .alpha.-APM concentration in the neutralized liquid is controlled to fall within the range of from 3 to 10 wt. % at the finish of neutralization. Then, the liquid is heated to 50.degree. to 80.degree. C. and neutralization is effected with stirring to the isoelectric point of .alpha.-APM; or after the neutralization, the neutralized liquid is heated. The neutralized liquid is thereafter cooled with or without stirring so that crystals of .alpha.-APM are precipitated.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: November 30, 1993
    Assignee: Ajinomoto Co., Inc.
    Inventors: Shinichi Kishimoto, Kimiyasu Sakamoto, So Abe, Toshihisa Kato