Patents by Inventor Leonard L. Winneroski, Jr.

Leonard L. Winneroski, Jr. 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 3-exomethylenecepham sulfoxide esters
    Patent number: 5126446
    Abstract: 3-Exomethylenecepham sulfoxide esters are obtained in improved yields via cyclization of 3-methyl-2-(4-chlorosulfinyl-2-oxo-3-amino-1-azetidinyl)-3-butenoic acid esters under anhydrous conditions with a Lewis acid-type Friedel-Crafts catalyst in the presence of a nitro compound, e.g., nitromethane, nitroethane, nitropropane or nitrobenzene.
    Type: Grant
    Filed: January 4, 1991
    Date of Patent: June 30, 1992
    Assignee: Eli Lilly and Company
    Inventors: Frank Brown, Jr., Francis O. Ginah, Leonard L. Winneroski, Jr.