Granted Patent
Utility
US 4,097,382 · App. 05/781,729
Dewatering screen
Inventor:
Ronald D. Cruea
Patented Case
View Patent ↗
Granted: Jun 27, 1978
Filed: Mar 28, 1977
Inventor
Ronald D. Cruea
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.