Granted Patent
Utility
US 4,523,067 · App. 06/366,901
Temperature gradient zone melting apparatus
Inventors:
Roger H. Brown, Kuen Chow, Norman W. Goodwin, Jan Grinberg
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Apr 9, 1982
Inventors
Roger H. Brown
Kuen Chow
Norman W. Goodwin
Jan Grinberg
Assignee (at issue)
Hughes Aircraft Company
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.