Granted Patent
Utility
US 4,288,315 · App. 06/024,215
Benefication of fluorspar ores
Inventors:
John C. Morrisey, IV, Ulus R. Smith
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Mar 26, 1979
Inventors
John C. Morrisey, IV
Ulus R. Smith
Assignee (at issue)
ALLIED CONSULTING, INC.
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.