Granted Patent
Utility
US 4,563,895 · App. 06/642,488
Apparatus and method for ultrasonic detection of inclusions in molten metals
Inventor:
Charles E. Eckert
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Aug 20, 1984
Inventor
Charles E. Eckert
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.