Granted Patent
Utility
US 6,572,736 · App. 09/971,772
Non-woven web made with untreated clarifier sludge
Inventors:
Philip Bush, Ricky Burkeen, Robert H. Blanpied
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Oct 9, 2001
Inventors
Philip Bush
Ricky Burkeen
Robert H. Blanpied
Assignee (at issue)
Atlas Roofing 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.