Wedtech Corp.
Records under this name other than patents Wedtech Corp. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 4,351,855 | Noncrucible method of and apparatus for the vapor deposition of material upon a substrate using voltaic arc in vacuum Formerly held Term ended Term ended no later than Sep 28, 2002 · Low confidence | Term ended | Term ended no later than Sep 28, 2002 | Low confidence |
| US 4,438,153 | Method of and apparatus for the vapor deposition of material upon a substrate Formerly held 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 4,505,948 | Method of coating ceramics and quartz crucibles with material electrically transformed into a vapor phase Formerly held Term ended Term ended no later than Mar 19, 2005 · Low confidence | Term ended | Term ended no later than Mar 19, 2005 | Low confidence |
| US 4,537,794 | Method of coating ceramics Formerly held Term ended Term ended no later than Aug 27, 2005 · Low confidence | Term ended | Term ended no later than Aug 27, 2005 | Low confidence |
| US 4,548,670 | Silicon melting and evaporation method for high purity applications Formerly held Term ended Term ended no later than Oct 22, 2005 · Low confidence | Term ended | Term ended no later than Oct 22, 2005 | Low confidence |
| US 4,565,711 | Method of and apparatus for the coating of quartz crucibles with protective layers Formerly held Term ended Term ended no later than Jan 21, 2006 · Low confidence | Term ended | Term ended no later than Jan 21, 2006 | Low confidence |
| US 4,569,307 | Silicon melting and evaporation apparatus for high purity applications Term ended Term ended no later than Feb 11, 2006 · Low confidence | Term ended | Term ended no later than Feb 11, 2006 | Low confidence |
| US 4,569,733 | Method of treating rock to recover metal, oxygen, and water Formerly held Term ended Term ended no later than Feb 11, 2006 · Low confidence | Term ended | Term ended no later than Feb 11, 2006 | Low confidence |
| US 4,575,401 | Method of and apparatus for the drawing of bars of monocrystalline silicon Formerly held Term ended Term ended no later than Mar 11, 2006 · Low confidence | Term ended | Term ended no later than Mar 11, 2006 | Low confidence |
| US 4,596,113 | Rake with pivotal tines Formerly held Term ended Term ended no later than Jun 24, 2006 · Low confidence | Term ended | Term ended no later than Jun 24, 2006 | Low confidence |