Assignee
HAZEN RESEARCH
43 granted patents·924 citations·filing 1974–2020
Top patents by PatentIndex Score
43 records- 0197US4244734AProcess for recovering metal values from materials containing arsenicHAZEN RESEARCH·Filed 1979·Granted Jan 13, 1981·67 cites·18 claims
- 0296US4071357AProcess for recovering zinc from steel-making flue dustHAZEN RESEARCH·Filed 1976·Granted Jan 31, 1978·59 cites·5 claims
- 0395US4244735AChloride leach process for recovering metal values in the presence of arsenicHAZEN RESEARCH·Filed 1979·Granted Jan 13, 1981·40 cites·13 claims
- 0495US4053301AProcess for the direct production of steelHAZEN RESEARCH·Filed 1975·Granted Oct 11, 1977·58 cites·53 claims
- 0592US6786941B2Methods of controlling the density and thermal properties of bulk materialsHAZEN RESEARCH·Filed 2002·Granted Sep 7, 2004·43 cites·4 claims
- 0689US4244927AProcess for recovering arsenic compounds by sodium hydroxide leachingHAZEN RESEARCH·Filed 1979·Granted Jan 13, 1981·30 cites·19 claims
- 0789US3972795AAxial flow electrolytic cellHAZEN RESEARCH·Filed 1974·Granted Aug 3, 1976·68 cites·16 claims
- 0888US3938966AProcess for improving coalHAZEN RESEARCH·Filed 1974·Granted Feb 17, 1976·40 cites·9 claims
- 0986US4459103AAutomatic volatile matter content analyzerHAZEN RESEARCH·Filed 1982·Granted Jul 10, 1984·101 cites·16 claims
- 1082US3961914AProcess for treating coal to make it resistant to spontaneous combustionHAZEN RESEARCH·Filed 1974·Granted Jun 8, 1976·19 cites·16 claims
- 1180US3942765AStatic mixing apparatusHAZEN RESEARCH·Filed 1974·Granted Mar 9, 1976·39 cites·16 claims
- 1277US4229209AProcess for beneficiating goldHAZEN RESEARCH·Filed 1978·Granted Oct 21, 1980·16 cites·19 claims
- 1376US4556422AProcess for the recovery of lead and silver chloridesHAZEN RESEARCH·Filed 1981·Granted Dec 3, 1985·16 cites·27 claims
- 1475US5544859AApparatus and method for inhibiting the leaching of lead in waterHAZEN RESEARCH·Filed 1994·Granted Aug 13, 1996·31 cites·17 claims
- 1570US5762891AProcess for stabilization of arsenicHAZEN RESEARCH·Filed 1996·Granted Jun 9, 1998·25 cites·30 claims
- 1668US4257781AProcess for enhancing the fuel value of low BTU gasHAZEN RESEARCH·Filed 1979·Granted Mar 24, 1981·12 cites·34 claims
- 1768US4134907AProcess for enhancing the fuel value of low BTU gasHAZEN RESEARCH·Filed 1977·Granted Jan 16, 1979·21 cites·7 claims
- 1867US6422494B1Methods of controlling the density and thermal properties of bulk materialsHAZEN RESEARCH·Filed 2000·Granted Jul 23, 2002·5 cites·24 claims
- 1967US5660735AMethod for removing metals from waste solutionsHAZEN RESEARCH·Filed 1996·Granted Aug 26, 1997·30 cites·37 claims
- 2066US4423012AManganese and zinc solvent extraction processHAZEN RESEARCH·Filed 1981·Granted Dec 27, 1983·13 cites·27 claims
- 2164US4119410AProcess for improving coalHAZEN RESEARCH·Filed 1977·Granted Oct 10, 1978·15 cites·49 claims
- 2262US5904783AMethod for reducing lead leaching in fixturesHAZEN RESEARCH·Filed 1997·Granted May 18, 1999·16 cites·23 claims
- 2361US4276084AHydrometallurgical process for the recovery of leadHAZEN RESEARCH·Filed 1979·Granted Jun 30, 1981·9 cites·21 claims
- 2460US5536416AMethod for removing metals from a solutionHAZEN RESEARCH·Filed 1994·Granted Jul 16, 1996·17 cites·26 claims
- 2560US4098584ARemoval of impurities from coalHAZEN RESEARCH·Filed 1977·Granted Jul 4, 1978·16 cites·7 claims
- 2658US7208023B2Dry dust control materialsHAZEN RESEARCH·Filed 2003·Granted Apr 24, 2007·3 cites·9 claims
- 2758US4289529AProcess for beneficiating sulfide oresHAZEN RESEARCH·Filed 1979·Granted Sep 15, 1981·8 cites·63 claims
- 2857US4182308ASolar energy collectorHAZEN RESEARCH·Filed 1977·Granted Jan 8, 1980·19 cites·18 claims
- 2954US5399322ASelective recovery of dissolved metals and preparation of metal salt productsHAZEN RESEARCH·Filed 1992·Granted Mar 21, 1995·9 cites·32 claims
- 3054US4120665AProcess for improving coalHAZEN RESEARCH·Filed 1977·Granted Oct 17, 1978·11 cites·42 claims
- 3153US4276081AProcess for beneficiating oresHAZEN RESEARCH·Filed 1979·Granted Jun 30, 1981·7 cites·76 claims
- 3252US11664498B2Compositionally gradient nickel-rich cathode materials and methods for the manufacture thereofHAZEN RESEARCH·Filed 2020·Granted May 30, 2023·0 cites·11 claims
- 3351US5725613AMethod to reduce oxidative deterioration of bulk materialsHAZEN RESEARCH·Filed 1996·Granted Mar 10, 1998·11 cites·42 claims
- 3449US6231627B1Method to reduce oxidative deterioration of bulk materialsHAZEN RESEARCH·Filed 1998·Granted May 15, 2001·10 cites·42 claims
- 3548US10640847B2Recovery of rare earths from concentrates containing fluorineHAZEN RESEARCH·Filed 2016·Granted May 5, 2020·0 cites·21 claims
- 3644US5320759ASelective recovery of heavy metals using xanthatesHAZEN RESEARCH·Filed 1992·Granted Jun 14, 1994·9 cites·32 claims
- 3744US4239529AProcess for beneficiating sulfide oresHAZEN RESEARCH·Filed 1979·Granted Dec 16, 1980·4 cites·52 claims
- 3842US4289528AProcess for beneficiating sulfide oresHAZEN RESEARCH·Filed 1979·Granted Sep 15, 1981·4 cites·57 claims
- 3942US4108635ASolder skimmings recovery processHAZEN RESEARCH·Filed 1976·Granted Aug 22, 1978·4 cites·6 claims
- 4038US5919277AMethod to reduce oxidative deterioration of bulk materialsHAZEN RESEARCH·Filed 1997·Granted Jul 6, 1999·5 cites·33 claims
- 4138US4257881AProcess for beneficiating oxide oresHAZEN RESEARCH·Filed 1978·Granted Mar 24, 1981·3 cites·60 claims
- 4238US4205979AProcess for beneficiating oxide oresHAZEN RESEARCH·Filed 1978·Granted Jun 3, 1980·6 cites·41 claims
- 4338US4175924ATreatment of coal with metal containing compoundsHAZEN RESEARCH·Filed 1977·Granted Nov 27, 1979·5 cites·20 claims
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