Granted Patent
Utility
US 5,906,752 · App. 08/690,599
Self-cleaning belt filter with edge sealing means and method
Inventor:
Roger D. Williams
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: Jul 30, 1996
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.