Granted Patent
Utility
US 4,147,620 · App. 05/807,721
Method and apparatus for sorting contaminant material from processing material
Inventors:
Adrian Artiano, Darrell H. Halgrimson, Henry W. Joselovitz
Patented Case
View Patent ↗
Granted: Apr 3, 1979
Filed: Jun 15, 1977
Inventors
Adrian Artiano
Darrell H. Halgrimson
Henry W. Joselovitz
Assignee (at issue)
Black Clawson Company, 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.