Patents by Inventor Gug Y. Cheon

Gug Y. Cheon 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).

  • Process for producing .alpha.-L-aspartyl-L-phenylalanine methyl ester
    Patent number: 4760164
    Abstract: A process for preparing an .alpha.-L-aspartyl-L-phenylalanine methyl ester which comprises the steps of reacting formyl-L-aspartic anhydride with L-phenylalanine in the presence of water at a high pH, to produce formyl-.alpha.-L-aspartyl-L-phenylalanine; removing the formyl group from the formyl-.alpha.-L-aspartyl-L-phenylalanine and esterifying the resultant compound with methanol and hydrogen chloride to produce the hydrogen chloride salt of .alpha.-L-aspartyl-L-phenylalanine methyl ester; neutralizing the hydrogen chloride salt of .alpha.-L-aspartyl-L-phenylalanine methyl ester; and filtering the neutralized solution to produce .alpha.-L-aspartyl-L-phenylalanine methyl ester.
    Type: Grant
    Filed: February 25, 1986
    Date of Patent: July 26, 1988
    Assignee: Korea Green Cross Corporation
    Inventors: Jung Y. Park, Gug Y. Cheon, Do Y. Ahn, Dong J. Park