Granted Patent
Utility
US 5,584,913 · App. 08/289,850
Dust collector with two stage self-cleaning of filter elements
Inventor:
Roger D. Williams
Patented Case
View Patent ↗
Granted: Dec 17, 1996
Filed: Aug 12, 1994
Inventor
Roger D. Williams
Assignee (at issue)
Pneumafil 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.