Granted Patent
Utility
US 4,676,841 · App. 06/781,407
Fabrication of dielectrically isolated devices utilizing buried oxygen implant and subsequent heat treatment at temperatures above 1300.degree. C .
Inventor:
George K. Celler
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Sep 27, 1985
Inventor
George K. Celler
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Bell Laboratories
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.