Assignee
COLUMBIA GAS SYST
US·27 granted patents·906 citations·filing 1975–1991
Top patents by PatentIndex Score
27 records- 0192US5339654AHeat transfer apparatusCOLUMBIA GAS SYST·Filed 1991·Granted Aug 23, 1994·74 cites·20 claims
- 0290US4641631AApparatus and method for burning a combustible gas, and a heat exchanger for use in this apparatusCOLUMBIA GAS SYST·Filed 1985·Granted Feb 10, 1987·96 cites·19 claims
- 0389US4331129ASolar energy for LNG vaporizationCOLUMBIA GAS SYST·Filed 1979·Granted May 25, 1982·63 cites·4 claims
- 0488US4690689AGas tracer composition and methodCOLUMBIA GAS SYST·Filed 1985·Granted Sep 1, 1987·105 cites·7 claims
- 0587US4020821AGas-fired smooth top rangeCOLUMBIA GAS SYST·Filed 1976·Granted May 3, 1977·44 cites·14 claims
- 0686US4719767AAbsorption refrigeration and heat pump systemCOLUMBIA GAS SYST·Filed 1986·Granted Jan 19, 1988·38 cites·25 claims
- 0786US4646541AAbsorption refrigeration and heat pump systemCOLUMBIA GAS SYST·Filed 1984·Granted Mar 3, 1987·43 cites·18 claims
- 0886US4541410AApparatus and method for burning a combustible gas, and a heat exchanger for use in this apparatusCOLUMBIA GAS SYST·Filed 1983·Granted Sep 17, 1985·61 cites·15 claims
- 0983US4024839AGas-fired smooth top rangeCOLUMBIA GAS SYST·Filed 1975·Granted May 24, 1977·38 cites·21 claims
- 1081US4238206AUsing solvents for acidic gas removalCOLUMBIA GAS SYST·Filed 1979·Granted Dec 9, 1980·24 cites·10 claims
- 1179US4691532ADual cooling/heating system energy recoveryCOLUMBIA GAS SYST·Filed 1986·Granted Sep 8, 1987·31 cites·11 claims
- 1273US4551154AGas tracer composition and methodCOLUMBIA GAS SYST·Filed 1983·Granted Nov 5, 1985·35 cites·12 claims
- 1369US4742687ADual cooling/heating process and compositionCOLUMBIA GAS SYST·Filed 1986·Granted May 10, 1988·12 cites·10 claims
- 1468US4773255AApparatus for injecting gas into a pipelineCOLUMBIA GAS SYST·Filed 1987·Granted Sep 27, 1988·31 cites·14 claims
- 1567US5067330AHeat transfer apparatus for heat pumpsCOLUMBIA GAS SYST·Filed 1990·Granted Nov 26, 1991·24 cites·27 claims
- 1667US4067681AGas-fired smooth top rangeCOLUMBIA GAS SYST·Filed 1976·Granted Jan 10, 1978·20 cites·4 claims
- 1765US4742693AAbsorption refrigeration and heat pump systemCOLUMBIA GAS SYST·Filed 1986·Granted May 10, 1988·20 cites·14 claims
- 1864US4658750AApparatus and method for detecting gas bubbles in water, and apparatus for handling an oceanographic deviceCOLUMBIA GAS SYST·Filed 1985·Granted Apr 21, 1987·26 cites·10 claims
- 1963US4571984AApparatus and method for detecting gas bubbles in water, and apparatus for handling an oceanographic deviceCOLUMBIA GAS SYST·Filed 1983·Granted Feb 25, 1986·20 cites·15 claims
- 2062US4538460AMethod for determining permeabilityCOLUMBIA GAS SYST·Filed 1984·Granted Sep 3, 1985·23 cites·13 claims
- 2153US4722193AAbsorption refrigeration and heat pump systemCOLUMBIA GAS SYST·Filed 1986·Granted Feb 2, 1988·13 cites·9 claims
- 2249US4783990AApparatus for measuring the quantity of gas pumped by a compressorCOLUMBIA GAS SYST·Filed 1987·Granted Nov 15, 1988·13 cites·8 claims
- 2347US4676095AApparatus for measuring the work performed by a gas compressorCOLUMBIA GAS SYST·Filed 1985·Granted Jun 30, 1987·15 cites·6 claims
- 2445US4805450AMethod of locating hydrocarbon producing strata and the instrument thereforCOLUMBIA GAS SYST·Filed 1988·Granted Feb 21, 1989·16 cites·20 claims
- 2540US4623435ABackfill for magnesium anodesCOLUMBIA GAS SYST·Filed 1983·Granted Nov 18, 1986·11 cites·16 claims
- 2637US5077986AEnergy recovery system for absorption heat pumpsCOLUMBIA GAS SYST·Filed 1990·Granted Jan 7, 1992·8 cites·4 claims
- 2723US4641588AHeat shieldCOLUMBIA GAS SYST·Filed 1985·Granted Feb 10, 1987·2 cites·12 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →