Granted Patent
Utility
US 4,684,072 · App. 06/864,674
Blade for centrifugal media mill
Inventors:
Roy A. Nelson, Raymond A. Entriken, Randolph C. Grieves
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: May 19, 1986
Inventors
Roy A. Nelson
Raymond A. Entriken
Randolph C. Grieves
Assignee (at issue)
Epworth Manufacturing Co., 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.