Questar Inc.
Records under this name other than patents Questar Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 6 of 6 · Back to Questar Inc.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,775,006 | Audio amplifier activation device, audio amplifier, and remote broadcast system Lapsed on the fee record Ended Sep 26, 2021 · From the USPTO record | Lapsed on the fee record | Ended Sep 26, 2021 | From the USPTO record |
| US 6,256,143 | Stereoscopic, long-distance microscope Formerly held Term ended Term ended Feb 14, 2020 · From the USPTO record | Term ended | Term ended Feb 14, 2020 | From the USPTO record |
| US 7,494,014 | Shipping container for solid hazardous material Lapsed on the fee record Ended Feb 24, 2013 · From the USPTO record | Lapsed on the fee record | Ended Feb 24, 2013 | From the USPTO record |
| US 4,061,420 | Catadioptric lens system Term ended Term ended no later than Dec 6, 1997 · Low confidence | Term ended | Term ended no later than Dec 6, 1997 | Low confidence |
| US 4,235,508 | Dual focal length objective Term ended Term ended no later than Nov 25, 2000 · Low confidence | Term ended | Term ended no later than Nov 25, 2000 | Low confidence |
| US 4,728,770 | Dual axis optical system Term ended Term ended no later than Mar 1, 2008 · Low confidence | Term ended | Term ended no later than Mar 1, 2008 | Low confidence |