Granted Patent
Utility
US 4,540,790 · App. 06/488,575
Certain 4-substituted-2,6-bis(heteroaryl)pyridines
Inventors:
Paul Schmidt, William M. Hung
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Apr 25, 1983
Inventors
Paul Schmidt
William M. Hung
Assignee (at issue)
Hilton Davis Chemical Co.
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.