Granted Patent
Utility
US 5,818,732 · App. 07/880,702
Batch timer initialization for a sand classifying tank
Inventor:
Louis A. Vanderwilt
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: May 8, 1992
Inventor
Louis A. Vanderwilt
Assignee (at issue)
Eagle Iron Works
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.