Shell Development Company
Records under this name other than patents Shell Development Company holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 6 of 6 · Back to Shell Development Company
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 4,012,457 | Thermal cracking method for the production of ethylene and propylene in a molten metal bath Term ended Term ended no later than Mar 15, 1997 · Low confidence | Term ended | Term ended no later than Mar 15, 1997 | Low confidence |
| US 4,012,486 | Process for reducing the total sulfur content of Claus off-gases Term ended Term ended no later than Mar 15, 1997 · Low confidence | Term ended | Term ended no later than Mar 15, 1997 | Low confidence |
| US 4,167,619 | Purification of propylene polymerization product Term ended Term ended no later than Sep 11, 1999 · Low confidence | Term ended | Term ended no later than Sep 11, 1999 | Low confidence |
| US 4,215,000 | Dissolving barium sulfate scale with aqueous solutions of bicyclic macrocyclic polyethers and organic acid salts Term ended Term ended no later than Jul 29, 2000 · Low confidence | Term ended | Term ended no later than Jul 29, 2000 | Low confidence |
| US 4,428,987 | Process for improving copper-epoxy adhesion Term ended Term ended no later than Jan 31, 2004 · Low confidence | Term ended | Term ended no later than Jan 31, 2004 | Low confidence |
| US 4,536,586 | Trimethyl 6-oxabicyclo[3.2.1]octan-4-ols and 4-ones Term ended Term ended no later than Aug 20, 2005 · Low confidence | Term ended | Term ended no later than Aug 20, 2005 | Low confidence |