Thomas, JR., Widgery
Records under this name other than patents Thomas, JR., Widgery holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 6,035,644 | Turbine control valve Lapsed on the fee record Ended Mar 14, 2004 · From the USPTO record | Lapsed on the fee record | Ended Mar 14, 2004 | From the USPTO record |
| US 4,134,449 | Bellows sealing arrangement Term ended Term ended no later than Jan 16, 1999 · Low confidence | Term ended | Term ended no later than Jan 16, 1999 | Low confidence |
| US 4,254,715 | Solid fuel combustor and method of burning Term ended Term ended no later than Mar 10, 2001 · Low confidence | Term ended | Term ended no later than Mar 10, 2001 | Low confidence |
| US 4,332,295 | Composite ceramic heat exchange tube Term ended Term ended no later than Jun 1, 2002 · Low confidence | Term ended | Term ended no later than Jun 1, 2002 | Low confidence |
| US 4,336,721 | Gas analyzer Term ended Term ended no later than Jun 29, 2002 · Low confidence | Term ended | Term ended no later than Jun 29, 2002 | Low confidence |
| US 4,380,429 | Recirculating burner Term ended Term ended no later than Apr 19, 2003 · Low confidence | Term ended | Term ended no later than Apr 19, 2003 | Low confidence |
| US 4,437,217 | Composite ceramic heat exchange tube Term ended Term ended no later than Mar 20, 2004 · Low confidence | Term ended | Term ended no later than Mar 20, 2004 | Low confidence |
| US 4,892,139 | Means and method for preventing unwanted accumulation in heat exchangers Term ended Term ended no later than Jan 9, 2010 · Low confidence | Term ended | Term ended no later than Jan 9, 2010 | Low confidence |
| US 5,250,090 | Separation devices Term ended Term ended no later than Oct 5, 2013 · Low confidence | Term ended | Term ended no later than Oct 5, 2013 | Low confidence |
| US 5,296,112 | Oxygen monitoring devices Term ended Term ended no later than Mar 22, 2014 · Low confidence | Term ended | Term ended no later than Mar 22, 2014 | Low confidence |