Granted Patent
Utility
US 4,257,841 · App. 05/867,640
Stabilizing and supporting apparatus for float zone refined semiconductor crystal rod
Inventors:
John M. Ross, Kedar P. Gupta, Horst Krämer, John W. Burd
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Jan 6, 1978
Inventors
John M. Ross
Kedar P. Gupta
Horst Krämer
John W. Burd
Assignee (at issue)
Monsanto 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.