Granted Patent
Utility
US 4,417,059 · App. 06/294,375
Diphenylamino and indolyl substituted pyromellitides
Inventors:
Paul Schmidt, William M. Hung
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Aug 19, 1981
Inventors
Paul Schmidt
William M. Hung
Assignee (at issue)
Sterling Drug, Inc.
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.