Inventor · disambiguated record
Hoai T. Dovan
Also filed as: DOVAN HOAI T
25 granted patents·1,185 citations·filing 1981–1997
97Inventor score
Files withUNION OIL CO25
Top patents by PatentIndex Score
25 records- 0197US5246073AHigh temperature stable gelsUNION OIL CO·Filed 1992·Granted Sep 21, 1993·166 cites·60 claims
- 0295US5203834AFoamed gels having selective permeabilityUNION OIL CO·Filed 1992·Granted Apr 20, 1993·130 cites·25 claims
- 0394US4413680APermeability reduction in subterranean reservoirsUNION OIL CO·Filed 1981·Granted Nov 8, 1983·90 cites·25 claims
- 0493US4694906AMethod for emplacement of a gelatinous foam in gas flooding enhanced recoveryUNION OIL CO·Filed 1985·Granted Sep 22, 1987·83 cites·43 claims
- 0591US5617920AMethod for modifying gelation time of organically crosslinked, aqueous gelsUNION OIL CO·Filed 1994·Granted Apr 8, 1997·74 cites·40 claims
- 0689US5486312AHigh temperature stable gelsUNION OIL CO·Filed 1993·Granted Jan 23, 1996·58 cites·58 claims
- 0786US5244042ALanthanide-crosslinked polymers for subterranean injectionUNION OIL CO·Filed 1992·Granted Sep 14, 1993·50 cites·20 claims
- 0885US5335733AMethod for delaying gelation of a gelable polymer composition injected into a subterranean formationUNION OIL CO·Filed 1993·Granted Aug 9, 1994·43 cites·37 claims
- 0983US5268112AGel-forming compositionUNION OIL CO·Filed 1992·Granted Dec 7, 1993·55 cites·20 claims
- 1083US4534412AContinuous permeability reduction in subterranean reservoirsUNION OIL CO·Filed 1983·Granted Aug 13, 1985·40 cites·48 claims
- 1182US5213446ADrilling mud disposal techniqueUNION OIL CO·Filed 1991·Granted May 25, 1993·81 cites·20 claims
- 1282US5125456AComposition for selectively reducing subterranean formation permeabilityUNION OIL CO·Filed 1991·Granted Jun 30, 1992·42 cites·43 claims
- 1381US5762141AUltra-high temperature stable gelsUNION OIL CO·Filed 1997·Granted Jun 9, 1998·35 cites·21 claims
- 1475US5291949AMethod for inhibiting caustic flood breakthroughUNION OIL CO·Filed 1992·Granted Mar 8, 1994·33 cites·20 claims
- 1574US5957203AUltra-high temperature stable gelsUNION OIL CO·Filed 1994·Granted Sep 28, 1999·20 cites·29 claims
- 1670US5211858ALanthanide-crosslinked polymers for subterranean fluid containmentUNION OIL CO·Filed 1992·Granted May 18, 1993·22 cites·19 claims
- 1767US5111886ACrosslinked hydroxyethylcellulose and its usesUNION OIL CO·Filed 1991·Granted May 12, 1992·23 cites·46 claims
- 1866US5207934ACrosslinked hydroxyethylcellulose and its usesUNION OIL CO·Filed 1992·Granted May 4, 1993·16 cites·22 claims
- 1962US5418217AComposition for selectively reducing subterranean formation permeabilityUNION OIL CO·Filed 1993·Granted May 23, 1995·17 cites·12 claims
- 2060US5145012AMethod for selectively reducing subterranean water permeabilityUNION OIL CO·Filed 1990·Granted Sep 8, 1992·33 cites·30 claims
- 2159US4783492AContinuous permeability reduction in subterranean reservoirsUNION OIL CO·Filed 1985·Granted Nov 8, 1988·15 cites·14 claims
- 2257US5226480ARecovery system containing lanthanide-crosslinked polymersUNION OIL CO·Filed 1992·Granted Jul 13, 1993·18 cites·31 claims
- 2356US5263540ACrosslinked hydroxyethylcellulose and its usesUNION OIL CO·Filed 1992·Granted Nov 23, 1993·17 cites·20 claims
- 2446US5139087AMethod for ensuring injectivity of polymer solutionsUNION OIL CO·Filed 1991·Granted Aug 18, 1992·18 cites·20 claims
- 2533US5225090AVisible gels prepared using stainless steel as a crosslinking agentUNION OIL CO·Filed 1992·Granted Jul 6, 1993·6 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →