Granted Patent
Utility
US 4,350,019 · App. 06/218,760
Gas expansion/compression train
Inventor:
William Chocas
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Dec 22, 1980
Inventor
William Chocas
Assignee (at issue)
W. R. Grace & Co.
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.