Granted Patent
Utility
US 5,560,835 · App. 08/500,572
Pleated belt filter with suction means to remove debris
Inventor:
Roger D. Williams
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Jul 11, 1995
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.