Granted Patent
Utility
US 4,840,645 · App. 06/485,156
Rotary separator with a porous shroud
Inventors:
Lee R. Woodworth, Beb H. Rowlett
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Apr 15, 1983
Inventors
Lee R. Woodworth
Beb H. Rowlett
Assignee (at issue)
AlliedSignal, 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.