IP Library Granted Patent US 4,957,873
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,957,873
App. No.
07/411,196
Filed
1989-09-21
Granted
1990-09-18
Kind
A