Patents by Inventor Ramon J. Alabaster

Ramon J. Alabaster 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).

  • Resolution of .alpha.-pivaloyloxyethyl-(S)-3-(3,4-dihydroxyphenyl)-2-methylalantinate into its .alpha. and .beta. isomers
    Patent number: 4404392
    Abstract: Resolution of the .alpha. and .beta. isomers of .alpha.-pivaloyloxyethyl-(S)-3-(3,6-dihydroxyphenyl)-2-methylalaninate is accomplished by; (a) forming the (+) hydrogen tartrate salt of the mixture; (b) fractionally crystallizing the .beta.-isomer salt; and (c) recovering the .alpha.-isomer from the mother liquor by treatment with first a base and second a mineral acid.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: September 13, 1983
    Assignee: Merck & Co., Inc.
    Inventors: Ramon J. Alabaster, Stanley H. B. Wright