Inventor
HITZMAN DONALD O
41 patents
⚠️ This page may combine multiple inventors who share the name “HITZMAN DONALD O”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PHILLIPS PETROLEUM CO
28 patentsUS4450908AMay 29, 1984
Enhanced oil recovery process using microorganisms
PHILLIPS PETROLEUM CO135 citations96
US4446919AMay 8, 1984
Enhanced oil recovery using microorganisms
PHILLIPS PETROLEUM CO93 citations96
US4414334ANov 8, 1983
Oxygen scavenging with enzymes
PHILLIPS PETROLEUM CO125 citations96
US5165477ANov 24, 1992
Enzymatic decomposition of drilling mud
PHILLIPS PETROLEUM CO79 citations95
US4798801AJan 17, 1989
Production of methane by anaerobic fermentation of waste materials
PHILLIPS PETROLEUM CO38 citations92
US4044500AAug 30, 1977
Integrated fermentation-photosynthesis biomass process
PHILLIPS PETROLEUM CO44 citations92
US5126051AJun 30, 1992
Enzymatic decomposition of drilling mud
PHILLIPS PETROLEUM CO37 citations91
US4681758AJul 21, 1987
Shaped, flavored articles and method of producing same
PHILLIPS PETROLEUM CO30 citations90
US4540052ASep 10, 1985
Generation of microorganism control composition and use thereof
PHILLIPS PETROLEUM CO22 citations82
US4519984AMay 28, 1985
Apparatus for carrying out sparged reaction
PHILLIPS PETROLEUM CO26 citations82
US3982998ASep 28, 1976
Methanol foam fermentation to single cell protein by microorganisms
PHILLIPS PETROLEUM CO23 citations82
US4596778AJun 24, 1986
Single cell protein from sulfur energy sources
PHILLIPS PETROLEUM CO10 citations74
US4556635ADec 3, 1985
Determination of alcohol content in water imiscible organic systems
PHILLIPS PETROLEUM CO13 citations74
US4518489AMay 21, 1985
Oil Treatment
PHILLIPS PETROLEUM CO11 citations74
US4515700AMay 7, 1985
Gelled acid composition
PHILLIPS PETROLEUM CO8 citations74
US4302542ANov 24, 1981
Fermentation with thermophilic mixed cultures
PHILLIPS PETROLEUM CO10 citations74
US4145445AMar 20, 1979
Process for protein production
PHILLIPS PETROLEUM CO11 citations74
US4113017ASep 12, 1978
Hot effluent from partial oxidation of natural gas injected in oil recovery process
PHILLIPS PETROLEUM CO7 citations74
US4096073AJun 20, 1978
Microbial viscosifiers
PHILLIPS PETROLEUM CO11 citations74
US3981774ASep 21, 1976
Fermentation of oxygenated hydrocarbon compounds with thermophilic microorganisms
PHILLIPS PETROLEUM CO13 citations74
US3975234AAug 17, 1976
Microbial production of dicarboxylic acids
PHILLIPS PETROLEUM CO7 citations74
US3965985AJun 29, 1976
Microbial synthesis from aldehyde containing hydrocarbon derived products
PHILLIPS PETROLEUM CO8 citations74
US4439523AMar 27, 1984
Production of single cell protein material
PHILLIPS PETROLEUM CO7 citations73
US4399223AAug 16, 1983
Cellular product separation
PHILLIPS PETROLEUM CO6 citations73
US4380584AApr 19, 1983
Fermentation apparatus
PHILLIPS PETROLEUM CO4 citations63
US4340677AJul 20, 1982
Fermentation process
PHILLIPS PETROLEUM CO5 citations63
US3958038AMay 18, 1976
Recovery of cellular protein products from microbiological synthesis masses
PHILLIPS PETROLEUM CO2 citations63
US4169762AOct 2, 1979
Self-toxification process for aerobic fermentation
PHILLIPS PETROLEUM CO1 citations52
GEO MICROBIAL TECH INC
6 patentsUS5405531AApr 11, 1995
Method for reducing the amount of and preventing the formation of hydrogen sulfide in an aqueous system
GEO MICROBIAL TECH INC62 citations93
US5750392AMay 12, 1998
Composition 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 applications
GEO MICROBIAL TECH INC32 citations89
US5250483AOct 5, 1993
Method for treatment of catalysts using denitrifying bacteria
GEO MICROBIAL TECH INC10 citations72
US5509319AApr 23, 1996
Adapter for pipetter and hypodermic needle
GEO MICROBIAL TECH INC6 citations62
US4975193ADec 4, 1990
Method for removing cyanide from a fluid
GEO MICROBIAL TECH INC4 citations62
US5069787ADec 3, 1991
Method and apparatus for removing cyanide from a fluid
GEO MICROBIAL TECH INC1 citations52
NITRA GEN LLC
3 patentsUS7934544B2May 3, 2011
Method and apparatus for on-site nitrate production for a water processing system
NITRA GEN LLC4 citations58
US7992641B2Aug 9, 2011
Method and apparatus for on-site nitrate production for a water processing system
NITRA GEN LLC0 citations48
US7828061B2Nov 9, 2010
Method and apparatus for on-site nitrate production for a water processing system
NITRA GEN LLC0 citations48