Granted Patent
Utility
US 4,643,244 · App. 06/847,149
Gas-liquid heat exchange process and apparatus
Inventor:
Robert Bosworth
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Apr 2, 1986
Inventor
Robert Bosworth
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.