Patents by Inventor Casimir G. Antczak

Casimir G. Antczak 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).

  • Misoprostol
    Patent number: 5684177
    Abstract: In a process for making synthetic prostaglandin-type compounds such as misoprostol, organo metallic cuprate complexes capable of reacting with cyclopentenones are prepared by reaction of an alkyl lithium compound with a cuprous halide, followed by reaction of the resulting complex with a vinyl stannane, using an excess of alkyl lithium in the initial reaction and maintaining the excess present during the formation of the organo metallic cuprate complex.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: November 4, 1997
    Assignee: Torcan Chemical Ltd.
    Inventors: Yee-Fung Lu, Raymond So, Dan To, Casimir G. Antczak