Granted Patent
Utility
US 6,235,193 · App. 09/515,080
Adjustable continuous filtration system for cooking fats and cooking oils
Inventor:
Ronald J. Zappe
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Feb 28, 2000
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.