Water Development Technologies, Inc.
Records under this name other than patents Water Development Technologies, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
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| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 4,223,749 | Rotary earth boring drill bit with centrifugal foreign particle barrier device Formerly held Term ended Term ended no later than Sep 23, 2000 · Low confidence | Term ended | Term ended no later than Sep 23, 2000 | Low confidence |
| US 4,252,189 | Vibratory method for minimg shale oil or the like Formerly held Term ended Term ended no later than Feb 24, 2001 · Low confidence | Term ended | Term ended no later than Feb 24, 2001 | Low confidence |
| US 4,256,190 | Sonically assisted lubrication of journal bearings Formerly held Term ended Term ended no later than Mar 17, 2001 · Low confidence | Term ended | Term ended no later than Mar 17, 2001 | Low confidence |
| US 4,257,648 | Non-resonant cyclic drive system employing rectification of the cyclic output Formerly held Term ended Term ended no later than Mar 24, 2001 · Low confidence | Term ended | Term ended no later than Mar 24, 2001 | Low confidence |
| US 4,261,425 | Mechanically nutating drill driven by orbiting mass oscillator Formerly held Term ended Term ended no later than Apr 14, 2001 · Low confidence | Term ended | Term ended no later than Apr 14, 2001 | Low confidence |
| US 4,265,129 | Orbiting mass oscillator with oil film cushioned bearings Formerly held Term ended Term ended no later than May 5, 2001 · Low confidence | Term ended | Term ended no later than May 5, 2001 | Low confidence |
| US 4,266,619 | Down hole cycloidal drill drive Formerly held Term ended Term ended no later than May 12, 2001 · Low confidence | Term ended | Term ended no later than May 12, 2001 | Low confidence |
| US 4,271,915 | Elastically vibratory longitudinal jacketed drill Formerly held Term ended Term ended no later than Jun 9, 2001 · Low confidence | Term ended | Term ended no later than Jun 9, 2001 | Low confidence |
| US 4,280,558 | Sonic technique and system for facilitating the extraction of mineral material Formerly held Term ended Term ended no later than Jul 28, 2001 · Low confidence | Term ended | Term ended no later than Jul 28, 2001 | Low confidence |
| US 4,323,119 | Vibratory apparatus for mining shale oil or the like Formerly held Term ended Term ended no later than Apr 6, 2002 · Low confidence | Term ended | Term ended no later than Apr 6, 2002 | Low confidence |