Granted Patent
Utility
US 5,186,332 · App. 07/715,445
Paper stock screening apparatus having heavy rejects trap
Inventors:
Derald R. Hatton, Joseph P. Constiner, David E. Suica
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Jun 14, 1991
Inventors
Derald R. Hatton
Joseph P. Constiner
David E. Suica
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.