Granted Patent
Utility
US 4,957,873 · App. 07/411,196
Process for forming isolation trenches in silicon semiconductor bodies
Inventors:
Sureshchandra M. Ojha, Paul J. Rosser, Philip B. Moynagh
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Sep 21, 1989
Inventors
Sureshchandra M. Ojha
Paul J. Rosser
Philip B. Moynagh
Assignee (at issue)
STC PLC
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.