Inventor · disambiguated record
David W. Leyshon
Also filed as: LEYSHON DAVID W
40 granted patents·10 pending applications·937 citations·filing 1972–2023
98Inventor score
Files withLYONDELL CHEMICAL TECH LP19ARCO CHEM TECH13ATLANTIC RICHFIELD CO5BASELL POLIOLEFINE ITALIA SRL2DORR OLIVER INC2
Top patents by PatentIndex Score
50 records- 0199US5026935AEnhanced production of ethylene from higher hydrocarbonsARCO CHEM TECH·Filed 1989·Granted Jun 25, 1991·156 cites·2 claims
- 0299US5026936AEnhanced production of propylene from higher hydrocarbonsARCO CHEM TECH·Filed 1989·Granted Jun 25, 1991·163 cites·1 claims
- 0396USRE35632EMethane conversion processATLANTIC RICHFIELD CO·Filed 1993·Granted Oct 14, 1997·61 cites·1 claims
- 0494USRE35633EMethane conversion processATLANTIC RICHFIELD CO·Filed 1995·Granted Oct 14, 1997·59 cites·1 claims
- 0594US5043522AProduction of olefins from a mixture of Cu+ olefins and paraffinsARCO CHEM TECH·Filed 1990·Granted Aug 27, 1991·146 cites·4 claims
- 0689US5591875AEpoxidation ProcessFiled 1996·Granted Jan 7, 1997·50 cites·22 claims
- 0789US4017585AFluid bed calcination processDORR OLIVER INC·Filed 1974·Granted Apr 12, 1977·38 cites·2 claims
- 0886US7144499B2Desulfurization processLYONDELL CHEMICAL TECH LP·Filed 2003·Granted Dec 5, 2006·36 cites·16 claims
- 0983US7527725B2Upgrading drip oilEQUISTAR CHEM LP·Filed 2006·Granted May 5, 2009·5 cites·5 claims
- 1083US4801762AMethane conversion processATLANTIC RICHFIELD CO·Filed 1987·Granted Jan 31, 1989·13 cites·32 claims
- 1181US4886932AThin bed cofeed reaction system for methane conversionATLANTIC RICHFIELD CO·Filed 1988·Granted Dec 12, 1989·35 cites·8 claims
- 1279US8981133B2Alkylene oxide separation systems, methods, and apparatusesLI XIANGMIN·Filed 2011·Granted Mar 17, 2015·3 cites·21 claims
- 1378US5192809AProcess for reclaiming a thermoset polymerARCO CHEM TECH·Filed 1992·Granted Mar 9, 1993·33 cites·33 claims
- 1474US7816572B2Propylene and isoprene productionLYONDELL CHEMICAL TECH LP·Filed 2007·Granted Oct 19, 2010·3 cites·20 claims
- 1573US9593090B2Alkylene oxide separation systems, methods, and apparatusesLYONDELL CHEMICAL TECH LP·Filed 2014·Granted Mar 14, 2017·2 cites·8 claims
- 1672US4876409AThin bed cofeed reactors for methane conversionATLANTIC RICHFIELD CO·Filed 1988·Granted Oct 24, 1989·36 cites·7 claims
- 1770US6512129B1Epoxidation processARCO CHEM TECH·Filed 2002·Granted Jan 28, 2003·4 cites·7 claims
- 1870US3998929AFluidized bed processDORR OLIVER INC·Filed 1972·Granted Dec 21, 1976·18 cites·7 claims
- 1969US8178737B2Propylene productionLEYSHON DAVID W·Filed 2007·Granted May 15, 2012·3 cites·20 claims
- 2069US8067655B2Diisobutylene processNICHOLS NATALIE C M B·Filed 2008·Granted Nov 29, 2011·5 cites·7 claims
- 2166US6583300B1Epoxidation system with fixed bed reactorsARCO CHEM TECH·Filed 2002·Granted Jun 24, 2003·7 cites·4 claims
- 2266US4988830APropylene oxide productionARCO CHEM TECH·Filed 1989·Granted Jan 29, 1991·7 cites·5 claims
- 2365US11590477B2Titanated catalysts, methods of preparing titanated catalysts, and methods of epoxidationLYONDELL CHEMICAL TECH LP·Filed 2020·Granted Feb 28, 2023·0 cites·18 claims
- 2464US2024182388A1Propylene polyol conversion to olefin monomerBASELL POLIOLEFINE ITALIA SRL·Filed 2023·Application pending·0 cites
- 2564US2024182389A1Propylene polyol conversion to olefin monomerBASELL POLIOLEFINE ITALIA SRL·Filed 2023·Application pending·0 cites
- 2663US11261142B2Isobutylene to propylene process flow improvementLYONDELL CHEMICAL TECH LP·Filed 2021·Granted Mar 1, 2022·0 cites·19 claims
- 2763US2023339832A1Use of carbon dioxide to improve caustic washing of alkylene oxide / alkenyl benzene monomer streamsLYONDELL CHEMICAL TECH LP·Filed 2023·Application pending·0 cites
- 2861US11440858B2Method of improving olefin isomerizationLYONDELL CHEMICAL TECH LP·Filed 2021·Granted Sep 13, 2022·0 cites·15 claims
- 2960US6755979B2Peroxide impurities removalARCO CHEM TECH·Filed 2002·Granted Jun 29, 2004·2 cites·4 claims
- 3060US2022401934A1Method of improving isomerization catalyst lifetimeLYONDELL CHEMICAL TECH LP·Filed 2022·Application pending·0 cites
- 3158US5993673APurification processARCO CHEM TECH·Filed 1998·Granted Nov 30, 1999·21 cites·4 claims
- 3258US5254326AProduction of hydrogen peroxideARCO CHEM TECH·Filed 1993·Granted Oct 19, 1993·13 cites·2 claims
- 3358US5107001APropylene oxide productionARCO CHEM TECH·Filed 1990·Granted Apr 21, 1992·6 cites·5 claims
- 3458US2022135499A1Olefin isomerization with small crystallite zeolite catalystLYONDELL CHEMICAL TECH LP·Filed 2021·Application pending·0 cites
- 3557US7270742B2Organosulfur oxidation processLYONDELL CHEMICAL TECH LP·Filed 2003·Granted Sep 18, 2007·5 cites·21 claims
- 3656US10233166B2Alkylene oxide separation systems, methods, and apparatusesLYONDELL CHEMICAL TECH LP·Filed 2017·Granted Mar 19, 2019·0 cites·4 claims
- 3756US9932318B2Catalyst performance in propylene epoxidationLYONDELL CHEMICAL TECH LP·Filed 2016·Granted Apr 3, 2018·0 cites·14 claims
- 3854US10513472B2Methods of producing propylene and ethyleneLYONDELL CHEMICAL TECH LP·Filed 2018·Granted Dec 24, 2019·0 cites·18 claims
- 3953US7238260B2Purification of N-(2-hydroxyethyl)-2-pyrrolidoneLYONDELL CHEMICAL TECH LP·Filed 2004·Granted Jul 3, 2007·4 cites·4 claims
- 4051US2021129113A1Titanated catalysts, methods of preparing titanated catalysts, and methods of epoxidationLYONDELL CHEMICAL TECH LP·Filed 2020·Application pending·0 cites
- 4150US9643943B2Process for forming propylene oxide from oxidation of methyl benzyl alcoholLYONDELL CHEMICAL TECH LP·Filed 2016·Granted May 9, 2017·0 cites·20 claims
- 4247US2010145122A1Diisobutylene processZAK THOMAS S·Filed 2008·Application pending·0 cites
- 4346US10513502B2Alkylene oxide separation systemLYONDELL CHEMICAL TECH LP·Filed 2019·Granted Dec 24, 2019·0 cites·20 claims
- 4442US9873648B2Oxidative methods of phosphorus removal from liquid hydrocarbonsLYONDELL CHEMICAL TECH LP·Filed 2015·Granted Jan 23, 2018·0 cites·14 claims
- 4542US9586881B2Production of propylene glycol monoalkyl etherLYONDELL CHEMICAL TECH LP·Filed 2015·Granted Mar 7, 2017·0 cites·16 claims
- 4642US6562987B1Method for highly exothermic epoxidation reactionsARCO CHEM TECH·Filed 2002·Granted May 13, 2003·0 cites·4 claims
- 4740US2010155302A1Purification of ultralow sulfur diesel fuelKAMINSKY MARK P·Filed 2008·Application pending·0 cites
- 4839US2004178121A1Organosulfur oxidation processFiled 2003·Application pending·0 cites
- 4939US2008146856A1Propylene productionLEYSHON DAVID W·Filed 2006·Application pending·0 cites
- 5035US5194067ARecovery of hydrogen peroxideARCO CHEM TECH·Filed 1992·Granted Mar 16, 1993·3 cites·2 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →