Granted Patent
Utility
US 4,578,199 · App. 06/726,303
Cyclone separators
Inventors:
John D. Peel, Paul A. Knight
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Apr 25, 1985
Inventors
John D. Peel
Paul A. Knight
Assignee (at issue)
Beloit Corporation
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.