Granted Patent
Utility
US 6,114,048 · App. 09/148,126
Functionally graded metal substrates and process for making same
Inventors:
David E. Jech, Jordan P. Frazier, Richard H. Sworden, Juan Sepulveda
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Sep 4, 1998
Inventors
David E. Jech
Jordan P. Frazier
Richard H. Sworden
Juan Sepulveda
Assignee (at issue)
BRUSH WELLMAN, 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.