Granted Patent
Utility
US 4,493,623 · App. 06/468,066
Oil lubricated main drive shaft for fuel pump
Inventor:
James Curtis Nelson
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Feb 22, 1983
Inventor
James Curtis Nelson
Assignee (at issue)
Chandler Evans 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.