Granted Patent
Utility
US 5,969,227 · App. 09/016,514
Apparatus and method for testing lubricity
Inventor:
Norman P. Kenney
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Jan 30, 1998
Inventor
Norman P. Kenney
Assignee (at issue)
Newpark Drilling Fluids 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.