Granted Patent
Utility
US 4,298,408 · App. 06/110,159
Aluminum-titanium-boron master alloy
Inventors:
C. Ray Langdon, Alan R. Burkart
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Jan 7, 1980
Inventors
C. Ray Langdon
Alan R. Burkart
Assignee (at issue)
Cabot Berylco, 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.