Granted Patent
Utility
US 4,240,830 · App. 05/965,014
Method for making sintered metal-coated graphite for high-current collector brushes
Inventor:
Pang K. Lee
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Nov 30, 1978
Inventor
Pang K. Lee
Assignee (at issue)
Westinghouse Electric 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.