Patents by Inventor David Kronenthal

David Kronenthal 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).

  • Patent number: 4501697
    Abstract: Antibacterial activity is exhibited by .beta.-lactams having the formula ##STR1## wherein R is hydrogen or methoxy;R.sub.1 is an acyl group derived from a carboxylic acid;R.sub.2 and R.sub.3 are each independently hydrogen, alkyl, or aryl or R.sub.2 and R.sub.3 when taken together with the nitrogen atom to which they are attached are ##STR2## wherein n is 4 or 5 and R.sub.4 is hydrogen, alkyl or amino; and M.sup..sym. is hydrogen or a cation.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: February 26, 1985
    Assignee: E. R. Squibb & Sons, Inc.
    Inventor: David Kronenthal