Granted Patent
Utility
US 4,323,114 · App. 06/023,734
Cluster heat exchanger
Inventor:
Gerald D. Corey
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Mar 26, 1979
Inventor
Gerald D. Corey
Assignee (at issue)
Fansteel 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.