Granted Patent
Utility
US 6,210,590 · App. 09/179,064
Method for controlling the quality of cooking fats and cooking oils
Inventor:
Ronald J. Zappe
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Oct 26, 1998
Inventor
Ronald J. Zappe
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.