Granted Patent
Utility
US 4,156,738 · App. 05/840,362
Ureidonitriles useful as antihypertensives
Inventors:
Gregory W. Schwing, William Price, Dewey H. Smith, Jr.
Patented Case
View Patent ↗
Granted: May 29, 1979
Filed: Oct 7, 1977
Inventors
Gregory W. Schwing
William Price
Dewey H. Smith, Jr.
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.