Granted Patent
Utility
US 4,276,946 · App. 05/885,723
Biased lubricant compensator for an earth boring drill bit
Inventor:
Stuart C. Millsapps, Jr.
Patented Case
View Patent ↗
Granted: Jul 7, 1981
Filed: Mar 13, 1978
Inventor
Stuart C. Millsapps, Jr.
Assignee (at issue)
Hughes Tool Company LLC
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.