Patents by Inventor Naomasa Mizoguchi

Naomasa Mizoguchi 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 producing .alpha.-L-aspartyl-L-phenylalanine lower alkyl esters
    Patent number: 3962207
    Abstract: When hydrogen halide salts of L-aspartic anhydride are reacted with lower alkyl esters of L-phenylalanine to produce the corresponding L-aspartyl-L-phenylalanine esters, a significant increase in yield and in the proportion of the .alpha.-isomer to the .beta.-isomer is achieved when the reaction is carried out in the presence of a lower alkanol and of a strong acid, such as sulfuric acid, hydrogen chloride, or mono-esters of sulfuric acid with a lower alkanol.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: June 8, 1976
    Assignee: Ajinomoto Co., Inc.
    Inventors: Noboru Uchiyama, Masanori Nagao, Naomasa Mizoguchi