Patents by Inventor Elizabeth M. Smith

Elizabeth M. Smith 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).

  • Antihypertensive agents
    Patent number: 4431644
    Abstract: Compounds of the formula ##STR1## and the pharmaceutically acceptable salts thereof, wherein R.sup.1, R.sup.2 and R.sup.4 are independently selected from hydrogen and lower alkyl; R.sup.3 is hydrogen, lower alkyl or amino lower alkyl; A and B taken together with the carbons to which they are attached form an alkylene ring having six carbon atoms or A and B are hydrogen; and Z is ##STR2## are disclosed. The compounds are useful as anti-hypertensive agents.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: February 14, 1984
    Assignee: Schering Corporation
    Inventors: Elizabeth M. Smith, Joseph T. Witkowski, Ronald J. Doll