Granted Patent
Utility
US 4,400,148 · App. 06/263,121
Recovery of fines in air laid papermaking
Inventors:
William J. Lawrence, Patrick W. Halferty
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: May 13, 1981
Inventors
William J. Lawrence
Patrick W. Halferty
Assignee (at issue)
James River-Dixie Northern, 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.