Granted Patent
Utility
US 4,625,048 · App. 06/684,412
Carbamic acid esters
Inventor:
Rene Zurfluh
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Dec 20, 1984
Inventor
Rene Zurfluh
Assignee (at issue)
HOFFMANN-LA ROCHE 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.