Granted Patent
Utility
US 4,249,595 · App. 06/073,465
Plate type heat exchanger with bar means for flow control and structural support
Inventor:
Alan G. Butt
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Sep 7, 1979
Inventor
Alan G. Butt
Assignee (at issue)
The Trane 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.