Granted Patent
Utility
US 4,238,436 · App. 06/037,864
Method of obtaining polycrystalline silicon
Inventors:
Lawrence R. Hill, Dennis Garbis, Robert Heller
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: May 10, 1979
Inventors
Lawrence R. Hill
Dennis Garbis
Robert Heller
Assignee (at issue)
General Instrument Corporation
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.