Petrocarbon Developments Limited
Records under this name other than patents Petrocarbon 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 3,944,400 | Method and apparatus for separating gases Term ended Term ended no later than Mar 16, 1996 · Low confidence | Term ended | Term ended no later than Mar 16, 1996 | Low confidence |
| US 3,956,415 | Plural stage distillation with intermediate indirect heat exchange, of feed streams comprising ethylene and methane Term ended Term ended no later than May 11, 1996 · Low confidence | Term ended | Term ended no later than May 11, 1996 | Low confidence |
| US 3,989,478 | Producing gaseous fuels of high calorific value Term ended Term ended no later than Nov 2, 1996 · Low confidence | Term ended | Term ended no later than Nov 2, 1996 | Low confidence |
| US 4,058,589 | Treatment of ammonia synthesis purge gas Term ended Term ended no later than Nov 15, 1997 · Low confidence | Term ended | Term ended no later than Nov 15, 1997 | Low confidence |
| US 4,255,406 | Treatment of ammonia synthesis purge gas Formerly held 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 4,266,957 | Recovery of hydrogen and ammonia from purge gas Formerly held Term ended Term ended no later than May 12, 2001 · Low confidence | Term ended | Term ended no later than May 12, 2001 | Low confidence |
| US 4,312,851 | Treatment of ammonia synthesis purge gas Formerly held Term ended Term ended no later than Jan 26, 2002 · Low confidence | Term ended | Term ended no later than Jan 26, 2002 | Low confidence |
| US 4,338,108 | Process for the recovery of argon Term ended Term ended no later than Jul 6, 2002 · Low confidence | Term ended | Term ended no later than Jul 6, 2002 | Low confidence |
| US 4,380,461 | Recovery of hydrogen from ammonia synthesis purge gas Formerly held 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 4,400,947 | Producing power from a cryogenic liquid Term ended Term ended no later than Aug 30, 2003 · Low confidence | Term ended | Term ended no later than Aug 30, 2003 | Low confidence |