Patents by Inventor David A. Hall, deceased

David A. Hall, deceased 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 preparing 4-substituted azetidinones
    Patent number: 4992545
    Abstract: A process for preparing 3-4-cis-.beta.,.beta.-(4)-substituted and 3-4-trans,.beta.,.alpha.- (4)-substituted azetidinones is provided. Also provided are novel 4,4-disubstituted azetidinones.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: February 12, 1991
    Assignee: Eli Lilly and Company
    Inventors: David A. Hall, deceased, John M. Morin, Jr., Robert J. Ternansky