Granted Patent
Utility
US 4,261,178 · App. 06/004,657
Environmental protection refrigeration disposal and charging system
Inventor:
Robert L. Cain
Patented Case
View Patent ↗
Granted: Apr 14, 1981
Filed: Jan 19, 1979
Inventor
Robert L. Cain
Assignee (at issue)
Robinair Manufacturing Corporation
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.