Granted Patent
Utility
US 6,015,268 · App. 08/580,744
Precision metered multiple fluid pumping system
Inventor:
Robert D. Hetherington
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Dec 29, 1995
Inventor
Robert D. Hetherington
Assignee (at issue)
ILLINOIS TOOL WORKS INC.
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.