Granted Patent
Utility
US 4,597,822 · App. 06/717,364
Method for making silicon wafers
Inventors:
John L. Benjamin, William R. Van Dell
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Mar 28, 1985
Inventors
John L. Benjamin
William R. Van Dell
Assignee (at issue)
General Electric 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.