Granted Patent
Utility
US 5,423,662 · App. 08/052,405
Precision metered multiple fluid pumping system
Inventor:
Robert D. Hetherington
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Apr 22, 1993
Inventor
Robert D. Hetherington
Assignee (at issue)
Binks Manufacturing Company
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.