Granted Patent
Utility
US 4,795,640 · App. 07/058,967
Oil in water emulsion containing propetamphos
Inventor:
Hans Helfenberger
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Jun 8, 1987
Inventor
Hans Helfenberger
Assignee (at issue)
Sandoz AG
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.