Patents by Inventor Stjephan P. Kukolja

Stjephan P. Kukolja 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).

  • Preparation of desacetoxy-cephalosporin sulfoxides from penicillin sulfoxides
    Patent number: 3960851
    Abstract: A penicillin sulfoxide ester is reacted with sulfuryl chloride at a temperature of from about 75.degree.C. to about 120.degree.C. to produce a novel 2-chlorosulfinyl-azetidin-4-one intermediate, which intermediate is treated with an alkaline reagent to produce a desaceetoxycephalosporin sulfoxide.
    Type: Grant
    Filed: July 11, 1974
    Date of Patent: June 1, 1976
    Assignee: Eli Lilly and Company
    Inventors: Stjephan P. Kukolja, Steven R. Lammert