Granted Patent
Utility
US 4,282,927 · App. 06/025,773
Multi-pass heat exchanger circuit
Inventor:
Carl E. Simmons
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Apr 2, 1979
Inventor
Carl E. Simmons
Assignee (at issue)
United Aircraft Products, 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.