Granted Patent
Utility
US 4,450,043 · App. 06/357,400
Method for recovering pulp from pressure-sensitive carbonless copying paper waste
Inventor:
William J. Schulz
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Mar 12, 1982
Inventor
William J. Schulz
Assignee (at issue)
Appleton Papers 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.