Granted Patent
Utility
US 4,332,774 · App. 06/179,528
Manufacture of hydrogen sulfide
Inventors:
Ian Drum, Richard S. Madenburg, Douglas M. Paulsrude, Carroll H. Sherman, Frank G. Turpin, Gerry A. Wheatcroft
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Aug 19, 1980
Inventors
Ian Drum
Richard S. Madenburg
Douglas M. Paulsrude
Carroll H. Sherman
Frank G. Turpin
Gerry A. Wheatcroft
Assignees (at issue)
Home Oil Company Limited
Morrison-Knudsen 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.