Granted Patent
Utility
US 4,905,914 · App. 06/714,054
Method of segregating metallic components and impurities
Inventor:
Kenneth A. Bowman
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Mar 20, 1985
Inventor
Kenneth A. Bowman
Assignee (at issue)
Aluminum Company of America
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.