Granted Patent
Utility
US 4,370,240 · App. 06/272,141
Removal of iron compounds from organic process streams
Inventors:
George L. Brownell, William R. Davie, Marvin C. Fields
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: Jun 10, 1981
Inventors
George L. Brownell
William R. Davie
Marvin C. Fields
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.