Granted Patent
Utility
US 4,887,773 · App. 07/222,014
Rotary mill with charging system
Inventor:
James C. Mehltretter
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Jul 21, 1988
Inventor
James C. Mehltretter
Assignee (at issue)
INCO Alloys International, 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.