Granted Patent
Utility
US 5,314,887 · App. 07/968,933
2-amino-1, 4-dihydropyridine derivatives with calcium agonist and alpha.sub. -antagonist activity
Inventors:
Paul E. Aldrich, Richard A. Earl, Philip Ma
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Oct 30, 1992
Inventors
Paul E. Aldrich
Richard A. Earl
Philip Ma
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.