Granted Patent
Utility
US 4,402,189 · App. 06/320,358
Refrigeration system condenser heat recovery at higher temperature than normal condensing temperature
Inventor:
Bruce S. Schaeffer
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Nov 12, 1981
Inventor
Bruce S. Schaeffer
Assignee (at issue)
Frick 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.