Assignee

DONALDSON A BURL

US·2 granted patents·55 citations·filing 1980–2014

Technology mixE21B2 F23D1 F23M1 Y02E1

Top patents by PatentIndex Score

2 records

0175US4411618ADownhole steam generator with improved preheating/cooling featuresDONALDSON A BURL·Filed 1980·Granted Oct 25, 1983·54 cites·3 claims
0256US9752422B2Direct electrical steam generation for downhole heavy oil stimulationDONALDSON A BURL·Filed 2014·Granted Sep 5, 2017·1 cites·23 claims

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