Inventor · disambiguated record
Michael Lefenfeld
Also filed as: LEFENFELD MICHAEL · LEFENFELD MICHAEL B
34 granted patents·11 pending applications·146 citations·filing 2003–2024
96Inventor score
Files withSIGNA CHEMISTRY INC18LEFENFELD MICHAEL9INTELLIGENT ENERGY LTD6WALLACE ANDREW P3CYANCO CORP2
Top patents by PatentIndex Score
45 records- 0194US8197707B2Lithium-porous metal oxide compositions and lithium reagent-porous metal compositionsLEFENFELD MICHAEL·Filed 2007·Granted Jun 12, 2012·21 cites·16 claims
- 0294US7811541B2Silicide compositions containing alkali metals and methods of making the sameSIGNA CHEMISTRY INC·Filed 2005·Granted Oct 12, 2010·20 cites·8 claims
- 0393US7410567B2Silica gel compositions containing alkali metals and alkali metal alloysSIGNA CHEMISTRY LLC·Filed 2007·Granted Aug 12, 2008·25 cites·22 claims
- 0492US8372371B2Silicide compositions containing alkali metals and methods of making the sameSIGNA CHEMISTRY INC·Filed 2010·Granted Feb 12, 2013·8 cites·15 claims
- 0591US9102528B2Hydrogen generation systems and methods utilizing sodium silicide and sodium silica gel materialsINTELLIGENT ENERGY LTD·Filed 2013·Granted Aug 11, 2015·7 cites·14 claims
- 0689US9845239B2Hydrogen generation systems and methods utilizing sodium silicide and sodium silica gel materialsINTELLIGENT ENERGY LTD·Filed 2015·Granted Dec 19, 2017·4 cites·5 claims
- 0789US9669371B2Hydrogen generation systems utilizing sodium silicide and sodium silica gel materialsINTELLIGENT ENERGY LTD·Filed 2015·Granted Jun 6, 2017·4 cites·17 claims
- 0889US8007762B2Silica gel compositions containing alkali metals and alkali metal alloysSIGNA CHEMISTRY INC·Filed 2010·Granted Aug 30, 2011·5 cites·20 claims
- 0987US7259128B2Titanium oxide and alumina alkali metal compositionsUNIV MICHIGAN STATE·Filed 2005·Granted Aug 21, 2007·5 cites·18 claims
- 1085US7211539B2Silica gel compositions containing alkali metals and alkali metal alloysUNIV MICHIGAN STATE·Filed 2004·Granted May 1, 2007·17 cites·33 claims
- 1180US9156687B2Water reactive hydrogen generation system and method with separation of waste products from water reactive materialsWALLACE ANDREW P·Filed 2012·Granted Oct 13, 2015·3 cites·36 claims
- 1279US9079146B2Hydrogen generation systems utilizing sodium silicide and sodium silica gel materialsWALLACE ANDREW P·Filed 2010·Granted Jul 14, 2015·3 cites·2 claims
- 1375US8986643B2Silicide compositions containing alkali metals and methods of making the sameLEFENFELD MICHAEL·Filed 2012·Granted Mar 24, 2015·1 cites·7 claims
- 1474US7932329B2Use of alkali metal-silica gel (M-SG) materials in solvent and monomer drying and purification for their use in anionic polymerizationSIGNA CHEMISTRY INC·Filed 2008·Granted Apr 26, 2011·3 cites·23 claims
- 1573US8895204B2Water reactive hydrogen fuel cell power systemINTELLIGENT ENERGY LTD·Filed 2013·Granted Nov 25, 2014·1 cites·32 claims
- 1671US8759599B2Catalytic dehydration of alcohols using phase pure, calcined single- and multi-site heterogeneous catalystsLEFENFELD MICHAEL·Filed 2010·Granted Jun 24, 2014·1 cites·26 claims
- 1770US9791108B2Use of metal silicides in hydrocarbon production and transportationSIGNA CHEMISTRY INC·Filed 2017·Granted Oct 17, 2017·1 cites·7 claims
- 1870US8632928B2Water reactive hydrogen fuel cell power systemWALLACE ANDREW P·Filed 2011·Granted Jan 21, 2014·1 cites·34 claims
- 1969US9657549B2Enhanced crude oil recovery using metal silicidesKRUMRINE PAUL H·Filed 2012·Granted May 23, 2017·2 cites·25 claims
- 2066US7820061B2Titanium oxide and alumina alkali metal compositionsSIGNA CHEMISTRY INC·Filed 2009·Granted Oct 26, 2010·0 cites·16 claims
- 2166US6833340B2System for delivery of active substancesLB DEVELOPMENTS LLC·Filed 2003·Granted Dec 21, 2004·11 cites·37 claims
- 2265US2015061600A1Water reactive hydrogen fuel cell power systemINTELLIGENT ENERGY LTD·Filed 2014·Application pending·0 cites
- 2361US9012709B2Catalytic dehydration of alcohols using phase pure, calcined single- and multi-site heterogeneous catalystsSIGNA CHEMISTRY INC·Filed 2014·Granted Apr 21, 2015·0 cites·3 claims
- 2461US7709410B2Silica gel compositions containing alkali metals and alkali metal alloysSIGNA CHEMISTRY INC·Filed 2008·Granted May 4, 2010·0 cites·13 claims
- 2561US2025272566A1Automated multivariate system performance analysisHEXION INC·Filed 2024·Application pending·0 cites
- 2661US2014306153A1Lithium-porous metal oxide compositions and lithium reagent-porous metal compositionsSIGNA CHEMISTRY INC·Filed 2014·Application pending·0 cites
- 2760US9494012B2Foamed cement compositions containing metal silicides usable in subterranean well operationsFALCONE JAMES S·Filed 2012·Granted Nov 15, 2016·2 cites·22 claims
- 2860US7560606B2Titanium oxide and alumina alkali metal compositionsSIGNA CHEMISTRY INC·Filed 2007·Granted Jul 14, 2009·0 cites·12 claims
- 2958US9409832B2Catalytic dehydration of alcohols using non-volatile acid catalystsSIGNA CHEMISTRY INC·Filed 2015·Granted Aug 9, 2016·0 cites·16 claims
- 3058US8501036B2Silica gel compositions containing alkali metals and alkali metal alloysLEFENFELD MICHAEL·Filed 2011·Granted Aug 6, 2013·0 cites·22 claims
- 3158US2009187486A1Method and apparatus for delivering targeted contentLEFENFELD MICHAEL·Filed 2009·Application pending·0 cites
- 3257US10024500B2Use of metal silicides in hydrocarbon production and transportationSIGNA CHEMISTRY INC·Filed 2017·Granted Jul 17, 2018·0 cites·4 claims
- 3357US2012235084A1Lithium-porous metal oxide compositions and lithium reagent-porous metal compositionsLEFENFELD MICHAEL·Filed 2012·Application pending·0 cites
- 3457US2015299625A1Silicide compositions containing alkali metals and methods of making the sameSIGNA CHEMISTRY INC·Filed 2015·Application pending·0 cites
- 3556US9040741B2Catalytic dehydration of alcohols using non-volatile acid catalystsLEFENFELD MICHAEL·Filed 2010·Granted May 26, 2015·0 cites·15 claims
- 3655US10309204B2Use of alkali metal silicides in post-chops oilfield recovery operationsSIGNA CHEMISTRY INC·Filed 2014·Granted Jun 4, 2019·1 cites·16 claims
- 3755US2016008798A1Catalytic dehydration of alcohols using phase pure, calcined single- and multi-site heterogeneous catalystsSIGNA CHEMISTRY INC·Filed 2015·Application pending·0 cites
- 3855US2023382751A1Preventing decomposition in sodium cyanide compositionsCYANCO CORP·Filed 2023·Application pending·0 cites
- 3955US2015376002A1Water Reactive Hydrogen Generation System and Method With Separation of Waste Products From Water Reactive MaterialsINTELLIGENT ENERGY LTD·Filed 2015·Application pending·0 cites
- 4053US8263808B2Method for deprotecting aryl or alkyl sulfonamides of primary or secondary aminesLEFENFELD MICHAEL·Filed 2007·Granted Sep 11, 2012·0 cites·16 claims
- 4150US11608274B2Alkali metal cyanide productionCYANCO CORP·Filed 2021·Granted Mar 21, 2023·0 cites·21 claims
- 4250US9677392B2Use of metal silicides in hydrocarbon production and transportationSIGNA CHEMISTRY INC·Filed 2013·Granted Jun 13, 2017·0 cites·14 claims
- 4348US10240443B2Alkali metal silicides for high temperature wettability improvement in carbonate reservoirsSIGNA CHEMISTRY INC·Filed 2014·Granted Mar 26, 2019·0 cites·20 claims
- 4447US2016045909A1Treatment of alkali silica gel and alkali porous metal oxide compositionsSIGNA CHEMISTRY INC·Filed 2014·Application pending·0 cites
- 4543US2012027827A1Method and Composition for Reducing Exhaled Carbon Dioxide EmissionsLEFENFELD MICHAEL·Filed 2011·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →