Patents by Inventor David E. Portlock

David E. Portlock 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).

  • 1-[Acylthio) and (mercapto)-1-oxoalkyl]-1,2,3,4-tetrahydroquinoline-2-carboxylic acids
    Patent number: 4461896
    Abstract: A series of 1-[acylthio) and (mercapto)-1-oxoalkyl]-1,2,3,4-tetrahydroquinoline-2-carboxylic acids and salts thereof are useful as Angiotensin I converting enzyme inhibitors.
    Type: Grant
    Filed: November 2, 1979
    Date of Patent: July 24, 1984
    Assignee: Norwich Eaton Pharmaceuticals, Inc.
    Inventor: David E. Portlock
  • 2-(3-Mercapto-1-oxopropyl)-1,2,3,4-tetrahydroisoquinoline-1-carboxylic acid derivatives
    Patent number: 4460775
    Abstract: Compounds of the formula: ##STR1## wherein R is H or ##STR2## and n is 0 or 1 are useful as angiotensin I converting enzyme inhibitors.
    Type: Grant
    Filed: August 9, 1979
    Date of Patent: July 17, 1984
    Assignee: Norwich Eaton Pharmaceuticals, Inc.
    Inventor: David E. Portlock
  • Converting enzyme inhibitor
    Patent number: 4273927
    Abstract: The compound 5,6-dihydro[1,4]thiazino[4,3-a]quinoline-1(2H),4(4aH)-dione is useful as an angiotensin converting enzyme inhibitor.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: June 16, 1981
    Assignee: Morton-Norwich Products, Inc.
    Inventors: Ralph L. White, Jr., David E. Portlock