Granted Patent
Utility
US 4,512,879 · App. 06/515,574
Process for producing a metalliferous concentrate from a particulate feed material
Inventors:
Yosry A. Attia, Ted L. Tewksbury
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Jul 20, 1983
Inventors
Yosry A. Attia
Ted L. Tewksbury
Assignee (at issue)
Battelle Development 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.