Granted Patent
Utility
US 4,415,021 · App. 06/293,725
Positioning a thin wall round wrapper within a heavy wall out-of-round shell of a heat exchanger
Inventors:
John R. Bayless, Homer G. Hargrove, Edwin G. Thompson
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Aug 17, 1981
Inventors
John R. Bayless
Homer G. Hargrove
Edwin G. Thompson
Assignee (at issue)
Westinghouse Electric Company LLC
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.