Granted Patent
Utility
US 5,160,443 · App. 07/686,984
Liquid recycling system
Inventor:
John S. Mesheau
Patented Case
View Patent ↗
Granted: Nov 3, 1992
Filed: Apr 18, 1991
Inventor
John S. Mesheau
Assignee (at issue)
Butler Associates
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.