Granted Patent
Utility
US 5,166,147 · App. 07/549,821
4-heteroaryl-and 4-aryl-1,4-dihydropyridine, derivatives with calcium agonist and alpha.sub.1 -antagonist activity
Inventor:
Richard A. Earl
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Jul 9, 1990
Inventor
Richard A. Earl
Assignee (at issue)
The DuPont Merck Pharmaceutical 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.