Granted Patent
Utility
US 4,769,151 · App. 06/925,886
Heater control for liquid flowing through a chamber
Inventor:
David R. Shouldice
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Oct 30, 1986
Inventor
David R. Shouldice
Assignee (at issue)
Cobe Laboratories, 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.