Granted Patent
Utility
US 4,418,919 · App. 06/471,093
Mechanical seals with setting block for use with slurry pumps
Inventor:
Robert S. Wentworth
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Mar 1, 1983
Inventor
Robert S. Wentworth
Assignee (at issue)
BorgWarner 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.