Granted Patent
Utility
US 4,538,767 · App. 06/675,254
Apparatus for recovering paper-making fiber from contaminated waste paper products
Inventor:
John J. Pimley
Patented Case
View Patent ↗
Granted: Sep 3, 1985
Filed: Nov 27, 1984
Inventor
John J. Pimley
Assignee (at issue)
Black Clawson Company, 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.