Dufaylite Developments Limited
Records under this name other than patents Dufaylite Developments Limited 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 3,942,300 | Apparatus for lapping a continuous length of honeycomb material Term ended Term ended no later than Mar 9, 1996 · Low confidence | Term ended | Term ended no later than Mar 9, 1996 | Low confidence |
| US 3,950,215 | Honeycomb materials Term ended Term ended no later than Apr 13, 1996 · Low confidence | Term ended | Term ended no later than Apr 13, 1996 | Low confidence |
| US 3,996,087 | Honeycomb materials 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 4,033,251 | Structural cellular materials Term ended Term ended no later than Jul 5, 1997 · Low confidence | Term ended | Term ended no later than Jul 5, 1997 | Low confidence |
| US 4,093,818 | Fire-protective cellular service ducting Term ended Term ended no later than Jun 6, 1998 · Low confidence | Term ended | Term ended no later than Jun 6, 1998 | Low confidence |
| US 4,149,355 | Packaging method and apparatus Term ended Term ended no later than Apr 17, 1999 · Low confidence | Term ended | Term ended no later than Apr 17, 1999 | Low confidence |
| US 4,187,138 | Slicing web material Term ended Term ended no later than Feb 5, 2000 · Low confidence | Term ended | Term ended no later than Feb 5, 2000 | Low confidence |
| US 4,202,253 | Structural cellular materials Term ended Term ended no later than May 13, 2000 · Low confidence | Term ended | Term ended no later than May 13, 2000 | Low confidence |
| US 4,340,441 | Slicing web material Term ended Term ended no later than Jul 20, 2002 · Low confidence | Term ended | Term ended no later than Jul 20, 2002 | Low confidence |
| US 4,649,089 | Intumescent materials Term ended Term ended no later than Mar 10, 2007 · Low confidence | Term ended | Term ended no later than Mar 10, 2007 | Low confidence |