Granted Patent
Utility
US 6,648,145 · App. 10/232,032
V-shaped disc screen and method of classifying mixed recyclable materials into four streams
Inventors:
Robert M. Davis, James Douglas Weller
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Aug 28, 2002
Inventors
Robert M. Davis
James Douglas Weller
Assignee (at issue)
CP MANUFACTURING, INC.
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.