Granted Patent
Utility
US 5,332,474 · App. 08/004,841
Conversion of pulp and paper mill waste solids to a papermaking filler product
Inventor:
John V. Maxham
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Jan 19, 1993
Inventor
John V. Maxham
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.