IP Library Granted Patent US 5,543,628
Granted Patent Utility
US 5,543,628 · App. 08/289,727

Quantum well infrared filter

Inventors: David H. Chow, Colin G. Whitney
Patented Case View Patent ↗
Granted: Aug 6, 1996 Filed: Aug 12, 1994
Inventors
David H. Chow
Colin G. Whitney
Assignee (at issue)
Hughes Aircraft Company

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 5,543,628
App. No.
08/289,727
Filed
1994-08-12
Granted
1996-08-06
Kind
A