Granted Patent
Utility
US 4,301,877 · App. 06/128,695
Clad mud nozzle
Inventor:
John D. Cloud
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Mar 10, 1980
Inventor
John D. Cloud
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.