Inventor · disambiguated record
Stephen A. Kujak
Also filed as: KUJAK STEPHEN · KUJAK STEPHEN A · KUJAK STEPHEN ANTHONY
42 granted patents·13 pending applications·167 citations·filing 1996–2025
97Inventor score
Top patents by PatentIndex Score
55 records- 0198US10465961B2Refrigerant leak detection by use of fluid additiveTRANE INT INC·Filed 2017·Granted Nov 5, 2019·20 cites·20 claims
- 0297US9556372B2Refrigerant compositionsTRANE INT INC·Filed 2015·Granted Jan 31, 2017·14 cites·5 claims
- 0395US11976858B2Refrigerant recovery and repurposingTRANE INT INC·Filed 2021·Granted May 7, 2024·2 cites·16 claims
- 0495US11703240B2Retrofitting R410A HVAC products to handle flammable refrigerantsTRANE INT INC·Filed 2021·Granted Jul 18, 2023·2 cites·13 claims
- 0595US10543737B2Cascade heat transfer systemTHERMO KING CORP·Filed 2016·Granted Jan 28, 2020·10 cites·20 claims
- 0692US11220620B2Lower GWP refrigerant compositionsTRANE INT INC·Filed 2020·Granted Jan 11, 2022·2 cites·17 claims
- 0792US11162720B2Refrigerant recovery and repurposingTRANE INT INC·Filed 2016·Granted Nov 2, 2021·5 cites·9 claims
- 0892US11118822B2Refrigerant leak detection by use of fluid additiveTRANE INT INC·Filed 2019·Granted Sep 14, 2021·3 cites·14 claims
- 0992US10443900B2Heat pumpTRANE INT INC·Filed 2016·Granted Oct 15, 2019·6 cites·13 claims
- 1091US10208234B2Refrigerant additives and compositionsTRANE INT INC·Filed 2018·Granted Feb 19, 2019·3 cites·6 claims
- 1191US9879164B2Refrigerant additives and compositionsTRANE INT INC·Filed 2014·Granted Jan 30, 2018·6 cites·6 claims
- 1289US11351842B2Cascade heat transfer systemTHERMO KING CORP·Filed 2020·Granted Jun 7, 2022·2 cites·21 claims
- 1389US9944839B2Refrigerant compositionsTRANE INT INC·Filed 2016·Granted Apr 17, 2018·4 cites·2 claims
- 1488US2025085035A1Refrigerant management in hvac systemsTRANE INT INC·Filed 2024·Application pending·0 cites
- 1587US12467668B2Refrigerant recovery and repurposingTRANE INT INC·Filed 2024·Granted Nov 11, 2025·0 cites·17 claims
- 1686US11162722B2Retrofitting R410A HVAC products to handle flammable refrigerantsTRANE INT INC·Filed 2018·Granted Nov 2, 2021·2 cites·7 claims
- 1786US9868888B2Refrigerant compositionsTRANE INT INC·Filed 2017·Granted Jan 16, 2018·2 cites·8 claims
- 1884US11073315B2Refrigeration system with purge and acid filterTRANE INT INC·Filed 2019·Granted Jul 27, 2021·2 cites·13 claims
- 1984US10655039B2Lower GWP refrigerant compositionsTRANE INT INC·Filed 2017·Granted May 19, 2020·2 cites·12 claims
- 2082US10400149B2Improving glide in refrigerant blends and/or azeotopic blends, alternatives to R123 refrigerant, and refrigerant compositions, methods, and systems thereofTRANE INT INC·Filed 2016·Granted Sep 3, 2019·2 cites·8 claims
- 2180US2025299272A1Systems and methods for grid appliancesC/O TRANE INT INC·Filed 2025·Application pending·0 cites
- 2277US11976234B2Refrigerant additives and compositionsTRANE INT INC·Filed 2021·Granted May 7, 2024·0 cites·8 claims
- 2374US12387281B2Systems and methods for grid appliancesTRANE INT INC·Filed 2023·Granted Aug 12, 2025·0 cites·18 claims
- 2474US12092378B2Refrigerant management in HVAC systemsTRANE INT INC·Filed 2020·Granted Sep 17, 2024·0 cites·7 claims
- 2574US11137183B2Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systemsTRANE INT INC·Filed 2019·Granted Oct 5, 2021·0 cites·5 claims
- 2674US10969148B2System and method for detecting refrigerant contamination in an HVACR systemTRANE INT INC·Filed 2017·Granted Apr 6, 2021·1 cites·15 claims
- 2774US2022026125A1Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systemsTRANE INT INC·Filed 2021·Application pending·0 cites
- 2873US11635239B2Refrigeration system with purge and acid filterTRANE INT INC·Filed 2021·Granted Apr 25, 2023·0 cites·19 claims
- 2973US2022127508A1Lower gwp refrigerant compositionsTRANE INT INC·Filed 2022·Application pending·0 cites
- 3072US11198805B2Refrigerant compositions and methods of useTRANE INT INC·Filed 2019·Granted Dec 14, 2021·0 cites·14 claims
- 3172US10988651B2Refrigerant additives and compositionsTRANE INT INC·Filed 2019·Granted Apr 27, 2021·0 cites·11 claims
- 3271US11008493B2Low global warming potential refrigerants in liquid chillersTRANE INT INC·Filed 2019·Granted May 18, 2021·0 cites·13 claims
- 3371US10886739B2Systems and methods for grid appliancesTRANE INT INC·Filed 2018·Granted Jan 5, 2021·1 cites·8 claims
- 3471US6572689B2Vapor/liquid separator for an absorption chillerAMERICAN STANDARD INT INC·Filed 2001·Granted Jun 3, 2003·22 cites·46 claims
- 3569US5946937ADual loop triple effect absorption chiller utilizing a common evaporator circuitGAS RES INST·Filed 1998·Granted Sep 7, 1999·26 cites·16 claims
- 3668US10316233B2Refrigerant compositionsTRANE INT INC·Filed 2018·Granted Jun 11, 2019·0 cites·3 claims
- 3767US10190808B2Refrigeration system with purge and acid filterTRANE INT INC·Filed 2013·Granted Jan 29, 2019·2 cites·9 claims
- 3866US11615488B2Systems and methods for grid appliancesTRANE INT INC·Filed 2020·Granted Mar 28, 2023·0 cites·19 claims
- 3966US10407602B2Low global warming potential refrigerants in liquid chillersTRANE INT INC·Filed 2017·Granted Sep 10, 2019·0 cites·17 claims
- 4066US2025026974A1Low gwp refrigerant compositionsTRANE INT INC·Filed 2024·Application pending·0 cites
- 4166US2019203093A1Lower gwp refrigerant compositionsTRANE INT INC·Filed 2018·Application pending·0 cites
- 4261US10465956B2Phobic/philic structures in refrigeration systems and liquid vapor separation in refrigeration systemsTRANE INT INC·Filed 2015·Granted Nov 5, 2019·0 cites·6 claims
- 4361US2025026973A1Low gwp refrigerant compositionsTHERMO KING LLC·Filed 2023·Application pending·0 cites
- 4460US10214670B2Refrigerant compositions and methods of useTRANE INT INC·Filed 2015·Granted Feb 26, 2019·0 cites·10 claims
- 4559US11078392B2Lower GWP refrigerant compositionsTRANE INT INC·Filed 2017·Granted Aug 3, 2021·0 cites·17 claims
- 4659US2025271188A1Autocascade system with superheat controlTRANE INT INC·Filed 2024·Application pending·0 cites
- 4758US2024084181A1Lower gwp refrigerant compositionsTRANE INT INC·Filed 2022·Application pending·0 cites
- 4856US5653117AAbsorption refrigeration compositions containing thiocyanate, and absorption refrigeration apparatusGAS RES INST·Filed 1996·Granted Aug 5, 1997·19 cites·16 claims
- 4956US2014223936A1Refrigerant management in hvac systemsTRANE INT INC·Filed 2012·Application pending·0 cites
- 5053US11421924B2Heat transfer circuit with targeted additive supplyTRANE INT INC·Filed 2019·Granted Aug 23, 2022·0 cites·19 claims
Showing the top 50 of 55 patent records by PatentIndex Score.
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