Granted Patent
Utility
US 4,637,855 · App. 06/728,959
Process for producing crystalline silicon spheres
Inventors:
David E. Witter, Jules D. Levine
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Apr 30, 1985
Inventors
David E. Witter
Jules D. Levine
Assignee (at issue)
Texas Instruments Incorporated
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.