Granted Patent
Utility
US 4,574,076 · App. 05/738,651
Removal of hydrogen sulfide from geothermal steam
Inventor:
Harry M. Castrantas
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Nov 4, 1976
Inventor
Harry M. Castrantas
Assignee (at issue)
FMC 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.