Granted Patent
Utility
US 4,882,294 · App. 07/233,319
Process for forming an epitaxial layer having portions of different thicknesses
Inventor:
John C. Christenson
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Aug 17, 1988
Inventor
John C. Christenson
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.