Inventor · disambiguated record
John A. Hamshar
Also filed as: HAMSHAR III JOHN A · HAMSHAR JOHN A · HAMSHAR RD JOHN A
12 granted patents·1,636 citations·filing 1982–1992
94Inventor score
Top patents by PatentIndex Score
12 records- 0198US5316664AProcess for recovery of hydrocarbons and rejection of sandOCCIDENTAL PETROLEUM CANADA·Filed 1992·Granted May 31, 1994·401 cites·83 claims
- 0298US4983319APreparation of low-viscosity improved stable crude oil transport emulsionsOCCIDENTAL PETROLEUM CANADA·Filed 1988·Granted Jan 8, 1991·349 cites·29 claims
- 0397US5340467AProcess for recovery of hydrocarbons and rejection of sandOCCIDENTAL PETROLEUM CANADA·Filed 1991·Granted Aug 23, 1994·386 cites·42 claims
- 0495US5110443AConverting heavy hydrocarbons into lighter hydrocarbons using ultrasonic reactorOCCIDENTAL PETROLEUM CANADA·Filed 1989·Granted May 5, 1992·91 cites·18 claims
- 0594US5083613AProcess for producing bitumenOCCIDENTAL PETROLEUM CANADA·Filed 1989·Granted Jan 28, 1992·120 cites·29 claims
- 0691US5283001AProcess for preparing a water continuous emulsion from heavy crude fractionOCCIDENTAL PETROLEUM CANADA·Filed 1991·Granted Feb 1, 1994·100 cites·82 claims
- 0790US4966235AIn situ application of high temperature resistant surfactants to produce water continuous emulsions for improved crude recoveryOCCIDENTAL PETROLEUM CANADA·Filed 1989·Granted Oct 30, 1990·62 cites·45 claims
- 0885US4415431AIntegrated oxygasification and hydropyrolysis process for producing liquid and gaseous hydrocarbonsCITIES SERVICE CO·Filed 1982·Granted Nov 15, 1983·32 cites·10 claims
- 0980US4725287APreparation of stable crude oil transport emulsionsOCCIDENTAL PETROLEUM CANADA·Filed 1986·Granted Feb 16, 1988·48 cites·45 claims
- 1064US5263848APreparation of oil-in-aqueous phase emulsion and removing contaminants by burningOCCIDENTAL PETROLEUM CANADA·Filed 1989·Granted Nov 23, 1993·19 cites·31 claims
- 1159US4978365APreparation of improved stable crude oil transport emulsionsOCCIDENTAL PETROLEUM CANADA·Filed 1987·Granted Dec 18, 1990·24 cites·35 claims
- 1228US4389388ADesulfurization of petroleum cokeCITIES SERVICE CO·Filed 1982·Granted Jun 21, 1983·4 cites·2 claims
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