Inventor · disambiguated record
Donald O. Hitzman
Also filed as: HITZMAN DONALD O
41 granted patents·1,348 citations·filing 1973–2010
98Inventor score
Top patents by PatentIndex Score
41 records- 0197US4450908AEnhanced oil recovery process using microorganismsPHILLIPS PETROLEUM CO·Filed 1982·Granted May 29, 1984·135 cites·7 claims
- 0295US4446919AEnhanced oil recovery using microorganismsPHILLIPS PETROLEUM CO·Filed 1982·Granted May 8, 1984·93 cites·15 claims
- 0394US7514058B1Apparatus for on-site production of nitrate ionsLATA GROUP INC·Filed 2008·Granted Apr 7, 2009·410 cites·9 claims
- 0494US4044500AIntegrated fermentation-photosynthesis biomass processPHILLIPS PETROLEUM CO·Filed 1974·Granted Aug 30, 1977·44 cites·4 claims
- 0593US4414334AOxygen scavenging with enzymesPHILLIPS PETROLEUM CO·Filed 1981·Granted Nov 8, 1983·125 cites·17 claims
- 0689US4798801AProduction of methane by anaerobic fermentation of waste materialsPHILLIPS PETROLEUM CO·Filed 1983·Granted Jan 17, 1989·38 cites·10 claims
- 0787US5405531AMethod for reducing the amount of and preventing the formation of hydrogen sulfide in an aqueous systemGEO MICROBIAL TECH INC·Filed 1993·Granted Apr 11, 1995·62 cites·23 claims
- 0887US5165477AEnzymatic decomposition of drilling mudPHILLIPS PETROLEUM CO·Filed 1992·Granted Nov 24, 1992·79 cites·18 claims
- 0983US7934544B2Method and apparatus for on-site nitrate production for a water processing systemNITRA GEN LLC·Filed 2010·Granted May 3, 2011·4 cites·1 claims
- 1083US5750392AComposition for reducing the amount of and preventing the formation of hydrogen sulfide in an aqueous system, particularly in an aqueous system used in oil field applicationsGEO MICROBIAL TECH INC·Filed 1994·Granted May 12, 1998·32 cites·17 claims
- 1176US4519984AApparatus for carrying out sparged reactionPHILLIPS PETROLEUM CO·Filed 1982·Granted May 28, 1985·26 cites·21 claims
- 1276US4261420AEnriched oil recovery using carbon dioxidePROVESTA CORP·Filed 1979·Granted Apr 14, 1981·27 cites·25 claims
- 1372US3982998AMethanol foam fermentation to single cell protein by microorganismsPHILLIPS PETROLEUM CO·Filed 1974·Granted Sep 28, 1976·23 cites·16 claims
- 1464US4681758AShaped, flavored articles and method of producing samePHILLIPS PETROLEUM CO·Filed 1986·Granted Jul 21, 1987·30 cites·21 claims
- 1562US5126051AEnzymatic decomposition of drilling mudPHILLIPS PETROLEUM CO·Filed 1990·Granted Jun 30, 1992·37 cites·13 claims
- 1662US4302542AFermentation with thermophilic mixed culturesPHILLIPS PETROLEUM CO·Filed 1977·Granted Nov 24, 1981·10 cites·27 claims
- 1762US4145445AProcess for protein productionPHILLIPS PETROLEUM CO·Filed 1976·Granted Mar 20, 1979·11 cites·18 claims
- 1859US7828061B2Method and apparatus for on-site nitrate production for a water processing systemNITRA GEN LLC·Filed 2009·Granted Nov 9, 2010·0 cites·20 claims
- 1959US7604741B1Method for on-site production of nitrate ionsLATA GROUP INC·Filed 2009·Granted Oct 20, 2009·0 cites·11 claims
- 2058US4540052AGeneration of microorganism control composition and use thereofPHILLIPS PETROLEUM CO·Filed 1983·Granted Sep 10, 1985·22 cites·38 claims
- 2157US3981774AFermentation of oxygenated hydrocarbon compounds with thermophilic microorganismsPHILLIPS PETROLEUM CO·Filed 1975·Granted Sep 21, 1976·13 cites·24 claims
- 2256US4518489AOil TreatmentPHILLIPS PETROLEUM CO·Filed 1982·Granted May 21, 1985·11 cites·21 claims
- 2353US4556635ADetermination of alcohol content in water imiscible organic systemsPHILLIPS PETROLEUM CO·Filed 1983·Granted Dec 3, 1985·13 cites·7 claims
- 2453US4096073AMicrobial viscosifiersPHILLIPS PETROLEUM CO·Filed 1975·Granted Jun 20, 1978·11 cites·7 claims
- 2552US7992641B2Method and apparatus for on-site nitrate production for a water processing systemNITRA GEN LLC·Filed 2010·Granted Aug 9, 2011·0 cites·19 claims
- 2648US4596778ASingle cell protein from sulfur energy sourcesPHILLIPS PETROLEUM CO·Filed 1983·Granted Jun 24, 1986·10 cites·17 claims
- 2747US3965985AMicrobial synthesis from aldehyde containing hydrocarbon derived productsPHILLIPS PETROLEUM CO·Filed 1974·Granted Jun 29, 1976·8 cites·15 claims
- 2846US5250483AMethod for treatment of catalysts using denitrifying bacteriaGEO MICROBIAL TECH INC·Filed 1992·Granted Oct 5, 1993·10 cites·10 claims
- 2946US4515700AGelled acid compositionPHILLIPS PETROLEUM CO·Filed 1983·Granted May 7, 1985·8 cites·13 claims
- 3046US4439523AProduction of single cell protein materialPHILLIPS PETROLEUM CO·Filed 1981·Granted Mar 27, 1984·7 cites·6 claims
- 3143US3975234AMicrobial production of dicarboxylic acidsPHILLIPS PETROLEUM CO·Filed 1975·Granted Aug 17, 1976·7 cites·8 claims
- 3240US4399223ACellular product separationPHILLIPS PETROLEUM CO·Filed 1981·Granted Aug 16, 1983·6 cites·8 claims
- 3339US4380584AFermentation apparatusPHILLIPS PETROLEUM CO·Filed 1982·Granted Apr 19, 1983·4 cites·11 claims
- 3438US4342835AFermentation process and apparatusPROVESTA CORP·Filed 1980·Granted Aug 3, 1982·6 cites·17 claims
- 3538US4113017AHot effluent from partial oxidation of natural gas injected in oil recovery processPHILLIPS PETROLEUM CO·Filed 1976·Granted Sep 12, 1978·7 cites·3 claims
- 3637US4340677AFermentation processPHILLIPS PETROLEUM CO·Filed 1980·Granted Jul 20, 1982·5 cites·10 claims
- 3736US4975193AMethod for removing cyanide from a fluidGEO MICROBIAL TECH INC·Filed 1990·Granted Dec 4, 1990·4 cites·5 claims
- 3833US3958038ARecovery of cellular protein products from microbiological synthesis massesPHILLIPS PETROLEUM CO·Filed 1973·Granted May 18, 1976·2 cites·9 claims
- 3932US5509319AAdapter for pipetter and hypodermic needleGEO MICROBIAL TECH INC·Filed 1994·Granted Apr 23, 1996·6 cites·11 claims
- 4031US4169762ASelf-toxification process for aerobic fermentationPHILLIPS PETROLEUM CO·Filed 1977·Granted Oct 2, 1979·1 cites·19 claims
- 4130US5069787AMethod and apparatus for removing cyanide from a fluidGEO MICROBIAL TECH INC·Filed 1990·Granted Dec 3, 1991·1 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →