Granted Patent
Utility
US 4,806,326 · App. 07/086,016
Phosphate feed material for phosphorus electric furnace
Inventor:
Joseph H. Finley
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Aug 17, 1987
Inventor
Joseph H. Finley
Assignee (at issue)
FMC 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.