Granted Patent
Utility
US 4,686,090 · App. 06/454,750
Desulfurizing of reducing gas stream using a recycle calcium oxide system
Inventors:
John L. Howell, Joseph E. McGreal, Edward J. Nemeth, Stephen Waslo, Jerome Feinman
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Dec 30, 1982
Inventors
John L. Howell
Joseph E. McGreal
Edward J. Nemeth
Stephen Waslo
Jerome Feinman
Assignee (at issue)
United States Steel 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.