Inventor · disambiguated record
Harry L. Chang
Also filed as: CHANG HARRY L
8 granted patents·184 citations·filing 1974–2012
88Inventor score
Top patents by PatentIndex Score
8 records- 0189US4008769AOil recovery by microemulsion injectionMOBIL OIL CORP·Filed 1975·Granted Feb 22, 1977·57 cites·15 claims
- 0285US3977470AOil recovery by alkaline-sulfonate waterfloodingMOBIL OIL CORP·Filed 1975·Granted Aug 31, 1976·42 cites·7 claims
- 0384US4004638AOil recovery by alkaline-surfactant waterfloodingMOBIL OIL CORP·Filed 1975·Granted Jan 25, 1977·45 cites·18 claims
- 0473US4018281AOil recovery by waterflooding with improved mobility controlMOBIL OIL CORP·Filed 1974·Granted Apr 19, 1977·15 cites·16 claims
- 0554US4773484AEnhanced oil recovery process with reduced gas drive mobilityATLANTIC RICHFIELD CO·Filed 1987·Granted Sep 27, 1988·13 cites·8 claims
- 0636US8991493B2Multi-stage enhanced oil recovery processCHANG HARRY L·Filed 2012·Granted Mar 31, 2015·0 cites·20 claims
- 0735US4195689AChemical waterflood process developmentCITIES SERVICE·Filed 1978·Granted Apr 1, 1980·4 cites·7 claims
- 0832US5285848AMethod for improving the recovery of oil from a subterranean formation by solvent concentration gradingATLANTIC RICHFIELD CO·Filed 1992·Granted Feb 15, 1994·8 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →