Purification Sciences Inc.
Records under this name other than patents Purification Sciences Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Back to Purification Sciences Inc.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 3,954,586 | Corona generator method and apparatus Formerly held Term ended Term ended no later than May 4, 1996 · Low confidence | Term ended | Term ended no later than May 4, 1996 | Low confidence |
| US 3,984,697 | Corona generator Term ended Term ended no later than Oct 5, 1996 · Low confidence | Term ended | Term ended no later than Oct 5, 1996 | Low confidence |
| US 3,996,474 | Corona generator apparatus Formerly held Term ended Term ended no later than Dec 7, 1996 · Low confidence | Term ended | Term ended no later than Dec 7, 1996 | Low confidence |
| US 4,215,659 | Internal combustion engine Term ended Term ended no later than Aug 5, 2000 · Low confidence | Term ended | Term ended no later than Aug 5, 2000 | Low confidence |
| US 4,228,659 | Gas turbine system Term ended Term ended no later than Oct 21, 2000 · Low confidence | Term ended | Term ended no later than Oct 21, 2000 | Low confidence |
| US 4,230,075 | Internal combustion engine Term ended Term ended no later than Oct 28, 2000 · Low confidence | Term ended | Term ended no later than Oct 28, 2000 | Low confidence |
| US 4,238,925 | Gas turbine system with oxygen vapor-fuel system Term ended Term ended no later than Dec 16, 2000 · Low confidence | Term ended | Term ended no later than Dec 16, 2000 | Low confidence |
| US 4,240,381 | Internal combustion engine system Term ended Term ended no later than Dec 23, 2000 · Low confidence | Term ended | Term ended no later than Dec 23, 2000 | Low confidence |
| US 4,290,268 | Vehicle braking and kinetic energy recovery system Term ended Term ended no later than Sep 22, 2001 · Low confidence | Term ended | Term ended no later than Sep 22, 2001 | Low confidence |
| US 4,300,486 | Internal combustion engine system technical field Term ended Term ended no later than Nov 17, 2001 · Low confidence | Term ended | Term ended no later than Nov 17, 2001 | Low confidence |