Patents by Inventor James C. Wisowaty

James C. Wisowaty 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).

  • Synthesis of leucovorin
    Patent number: 4500711
    Abstract: In the synthesis of calcium leucovorin (calcium 5-formyl-5,6,7,8-tetrahydrofolate), the use of an amine base in the conversion of anhydroleucovorin (5,10-methenyl-5,6,7,8-tetrahydrofolic acid) to leucovorin unexpectedly results in a pure (USP) product directly from the reaction mixture.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: February 19, 1985
    Assignee: Burroughs Wellcome Co.
    Inventors: James C. Wisowaty, Roy A. Swaringen, David A. Yeowell