Granted Patent
Utility
US 4,849,013 · App. 07/080,151
Combined electron beam and vacuum arc melting for barrier tube shell material
Inventors:
Samuel A. Worcester, Charles R. Woods
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Jul 30, 1987
Inventors
Samuel A. Worcester
Charles R. Woods
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.