Granted Patent
Utility
US 4,446,321 · App. 06/384,571
4-Aryl-bis 2,6-(aminophenyl)pyridines
Inventors:
Paul Schmidt, William M. Hung
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Jun 3, 1982
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.