Inventor · disambiguated record
Alexander Lifson
Also filed as: LIFSON ALEXANDER
173 granted patents·92 pending applications·4,000 citations·filing 1995–2019
99Inventor score
Top patents by PatentIndex Score
265 records- 0199US6474087B1Method and apparatus for the control of economizer circuit flow for optimum performanceCARRIER CORP·Filed 2001·Granted Nov 5, 2002·175 cites·11 claims
- 0298US6925823B2Refrigerant cycle with operating range extensionCARRIER CORP·Filed 2003·Granted Aug 9, 2005·123 cites·20 claims
- 0398US6047556APulsed flow for capacity controlCARRIER CORP·Filed 1997·Granted Apr 11, 2000·156 cites·3 claims
- 0497US8235101B2Parallel flow heat exchanger for heat pump applicationsTARAS MICHAEL F·Filed 2006·Granted Aug 7, 2012·52 cites·30 claims
- 0597US7255542B2Compressor with check valve orientated at angle relative to discharge tubeSCROLL TECH·Filed 2005·Granted Aug 14, 2007·35 cites·9 claims
- 0696US8079229B2Economized refrigerant vapor compression system for water heatingLIFSON ALEXANDER·Filed 2005·Granted Dec 20, 2011·43 cites·18 claims
- 0796US7997092B2Refrigerant vapor compression system operating at or near zero loadCARRIER CORP·Filed 2007·Granted Aug 16, 2011·39 cites·15 claims
- 0896US7854137B2Variable speed compressor motor control for low speed operationCARRIER CORP·Filed 2005·Granted Dec 21, 2010·42 cites·31 claims
- 0996US7674098B2Scroll compressor with vapor injection and unloader portSCROLL TECH·Filed 2006·Granted Mar 9, 2010·25 cites·8 claims
- 1096US7228710B2Indentation to optimize vapor injection through ports extending through scroll wrapSCROLL TECH·Filed 2005·Granted Jun 12, 2007·31 cites·14 claims
- 1196US6941770B1Hybrid reheat system with performance enhancementCARRIER CORP·Filed 2004·Granted Sep 13, 2005·84 cites·16 claims
- 1296US6694750B1Refrigeration system employing multiple economizer circuitsCARRIER CORP·Filed 2002·Granted Feb 24, 2004·90 cites·14 claims
- 1396US6238188B1Compressor control at voltage and frequency extremes of power supplyCARRIER CORP·Filed 1998·Granted May 29, 2001·92 cites·7 claims
- 1496US6042344AControl of scroll compressor at shutdown to prevent unpowered reverse rotationCARRIER CORP·Filed 1998·Granted Mar 28, 2000·96 cites·10 claims
- 1595US8079228B2Refrigerant system with multi-speed scroll compressor and economizer circuitLIFSON ALEXANDER·Filed 2009·Granted Dec 20, 2011·24 cites·1 claims
- 1695US7228707B2Hybrid tandem compressor system with multiple evaporators and economizer circuitCARRIER CORP·Filed 2004·Granted Jun 12, 2007·78 cites·19 claims
- 1795US7204099B2Refrigerant system with vapor injection and liquid injection through separate passagesCARRIER CORP·Filed 2005·Granted Apr 17, 2007·22 cites·20 claims
- 1895US6981384B2Monitoring refrigerant chargeCARRIER CORP·Filed 2004·Granted Jan 3, 2006·76 cites·20 claims
- 1995US6571576B1Injection of liquid and vapor refrigerant through economizer portsCARRIER CORP·Filed 2002·Granted Jun 3, 2003·91 cites·8 claims
- 2095US5996364AScroll compressor with unloader valve between economizer and suctionCARRIER CORP·Filed 1998·Granted Dec 7, 1999·101 cites·17 claims
- 2194US8528359B2Economized refrigeration cycle with expanderLIFSON ALEXANDER·Filed 2006·Granted Sep 10, 2013·27 cites·19 claims
- 2294US8136364B2Refrigerant system with expansion device bypassLIFSON ALEXANDER·Filed 2006·Granted Mar 20, 2012·28 cites·19 claims
- 2394US6799951B2Compressor degradation detection systemCARRIER CORP·Filed 2002·Granted Oct 5, 2004·55 cites·16 claims
- 2493US8418486B2Refrigerant system with variable speed compressor and reheat functionTARAS MICHAEL F·Filed 2005·Granted Apr 16, 2013·22 cites·5 claims
- 2593US7523623B2Heat pump with reheat and economizer functionsCARRIER CORP·Filed 2007·Granted Apr 28, 2009·20 cites·13 claims
- 2693US7272948B2Heat pump with reheat and economizer functionsCARRIER CORP·Filed 2004·Granted Sep 25, 2007·51 cites·19 claims
- 2793US7114349B2Refrigerant system with common economizer and liquid-suction heat exchangerCARRIER CORP·Filed 2004·Granted Oct 3, 2006·76 cites·18 claims
- 2893US7059151B2Refrigerant systems with reheat and economizerCARRIER CORP·Filed 2004·Granted Jun 13, 2006·62 cites·21 claims
- 2993US5510582AAcoustic attenuator, well logging apparatus and method of well loggingHALLIBURTON CO·Filed 1995·Granted Apr 23, 1996·133 cites·24 claims
- 3092US8307669B2Multi-channel flat tube evaporator with improved condensate drainageTARAS MICHAEL F·Filed 2007·Granted Nov 13, 2012·18 cites·28 claims
- 3192US8096139B2Refrigerant system with variable speed driveTARAS MICHAEL F·Filed 2005·Granted Jan 17, 2012·22 cites·12 claims
- 3292US7958737B2Method and control for preventing flooded starts in a heat pumpCARRIER CORP·Filed 2005·Granted Jun 14, 2011·21 cites·20 claims
- 3392US7721562B2Refrigerant system with multi-speed scroll compressor and economizer circuitSCROLL TECH·Filed 2005·Granted May 25, 2010·16 cites·14 claims
- 3492US6305914B1Counterweight of reduced sizeSCROLL TECH·Filed 2000·Granted Oct 23, 2001·39 cites·11 claims
- 3591US7234311B2Prevention of compressor unpowered reverse rotation in heat pump unitsCARRIER CORP·Filed 2005·Granted Jun 26, 2007·19 cites·23 claims
- 3690US8347643B2Indoor air quality improvement by re-evaporation controlCARRIER CORP·Filed 2006·Granted Jan 8, 2013·20 cites·34 claims
- 3790US6883341B1Compressor with unloader valve between economizer line and evaporator inletCARRIER CORP·Filed 2003·Granted Apr 26, 2005·45 cites·10 claims
- 3890US6736622B1Scroll compressor with offset scroll membersSCROLL TECH·Filed 2003·Granted May 18, 2004·31 cites·8 claims
- 3989US8373099B2Heat pump with heat recoveryCARRIER CORP·Filed 2007·Granted Feb 12, 2013·13 cites·36 claims
- 4089US7343750B2Diagnosing a loss of refrigerant charge in a refrigerant systemCARRIER CORP·Filed 2003·Granted Mar 18, 2008·43 cites·18 claims
- 4189US7275384B2Heat pump with reheat circuitCARRIER CORP·Filed 2004·Granted Oct 2, 2007·46 cites·20 claims
- 4289US6058729AMethod of optimizing cooling capacity, energy efficiency and reliability of a refrigeration system during temperature pull downCARRIER CORP·Filed 1998·Granted May 9, 2000·82 cites·13 claims
- 4388US8381538B2Heat pump with intercoolerCARRIER CORP·Filed 2006·Granted Feb 26, 2013·13 cites·20 claims
- 4488US6955058B2Refrigerant cycle with tandem economized and conventional compressorsCARRIER CORP·Filed 2004·Granted Oct 18, 2005·41 cites·17 claims
- 4588US6430959B1Economizer injection ports extending through scroll wrapSCROLL TECH·Filed 2002·Granted Aug 13, 2002·42 cites·10 claims
- 4687US10107535B2Pressure spike reduction for refrigerant systems incorporating a microchannel heat exchangerTARAS MICHAEL F·Filed 2010·Granted Oct 23, 2018·5 cites·2 claims
- 4787US7836713B2Speed control of multiple components in refrigerant systemsCARRIER CORP·Filed 2005·Granted Nov 23, 2010·12 cites·26 claims
- 4887US7481069B2Controlling a voltage-to-frequency ratio for a variable speed drive in refrigerant systemsCARRIER CORP·Filed 2005·Granted Jan 27, 2009·12 cites·16 claims
- 4987US7290399B2Multi-circuit dehumidification heat pump systemCARRIER CORP·Filed 2004·Granted Nov 6, 2007·38 cites·21 claims
- 5086US8375741B2Refrigerant system with intercooler and liquid/vapor injectionCARRIER CORP·Filed 2007·Granted Feb 19, 2013·11 cites·20 claims
Showing the top 50 of 265 patent records by PatentIndex Score.
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