Granted Patent
Utility
US 5,250,837 · App. 07/936,720
Method for dielectrically isolating integrated circuits using doped oxide sidewalls
Inventor:
Douglas Ray Sparks
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Aug 31, 1992
Inventor
Douglas Ray Sparks
Assignee (at issue)
DELCO ELECTRONICS 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.