Granted Patent
Utility
US 5,576,439 · App. 08/331,071
Dihydropyridinecarboxylic acid anhydrides
Inventor:
Benjamin Mugrage
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Oct 28, 1994
Inventor
Benjamin Mugrage
Assignee (at issue)
Ciba-Geigy
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.