Granted Patent
Utility
US 4,297,775 · App. 06/147,776
Method for joining two plate type heat exchanger core sections with an intermodular layer for improved heat transfer
Inventors:
Alan G. Butt, Abe G. Whitehead
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: May 8, 1980
Inventors
Alan G. Butt
Abe G. Whitehead
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.