Granted Patent
Utility
US 4,222,763 · App. 05/968,232
Gas jet pump, and apparatus using same
Inventor:
Harold A. McMaster
Patented Case
View Patent ↗
Granted: Sep 16, 1980
Filed: Dec 11, 1978
Inventor
Harold A. McMaster
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.