Assignee
CNPC GREATWALL DRILLING ENGINE
CN·2 granted patents·18 citations·filing 2007–2007
Top patents by PatentIndex Score
2 records- 0178US7754102B2Method for reclaim of carbon dioxide and nitrogen from boiler flue gasCNPC GREATWALL DRILLING ENGINE·Filed 2007·Granted Jul 13, 2010·14 cites·7 claims
- 0271US7644756B2Oil recovery by injection of steam, carbon dioxide and nitrogenCNPC GREATWALL DRILLING ENGINE·Filed 2007·Granted Jan 12, 2010·4 cites·1 claims
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