Granted Patent
Utility
US 5,775,446 · App. 08/675,717
Nozzle insert for rotary rock bit
Inventor:
W. Gerald Lott
Patented Case
View Patent ↗
Granted: Jul 7, 1998
Filed: Jul 3, 1996
Inventor
W. Gerald Lott
Assignee (at issue)
Nozzle Technology, 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.