IP Library › Granted Patent US 4,321,469
Granted Patent Utility
US 4,321,469 · App. 06/140,501

Nucleonic gauge for determining lubricant level in a joint and method

Inventors: William P. Evans, Jan C. Kline
Patented Case View Patent ↗
Granted: Mar 23, 1982 Filed: Dec 17, 1979
Inventors
William P. Evans
Jan C. Kline
Assignee (at issue)
Caterpillar Tractor Co.

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,321,469
App. No.
06/140,501
Filed
1979-12-17
Granted
1982-03-23
Kind
A