Inventor · disambiguated record

Eric D. Schwerdtfeger

Also filed as: SCHWERDTFEGER ERIC · SCHWERDTFEGER ERIC D

75 granted patents·3 pending applications·780 citations·filing 2011–2024

99Inventor score

Technology areasC08F B01J G01N C08L C08G

Files withCHEVRON PHILLIPS CHEMICAL CO LP73 CHEVRON PHILLIPS CHEMICAL CO3 RAJAENDRAN GEORGE R1 YU YOULU1

Top patents by PatentIndex Score

78 records

0199US11814457B2Particle size control of metallocene catalyst systems in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2023·Granted Nov 14, 2023·4 cites·21 claims
0299US11634521B2Particle size control of metallocene catalyst systems in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Apr 25, 2023·4 cites·34 claims
0399US11492430B2Particle size control of metallocene catalyst systems in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Nov 8, 2022·10 cites·26 claims
0499US11383222B2Methods of preparing a catalyst with low HRVOC emissionsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Jul 12, 2022·7 cites·20 claims
0599US11326005B1Particle size control of metallocene catalyst systems in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2021·Granted May 10, 2022·4 cites·22 claims
0699US11325997B1Particle size control of supported chromium catalysts in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2021·Granted May 10, 2022·9 cites·22 claims
0799US11124586B1Particle size control of metallocene catalyst systems in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Sep 21, 2021·19 cites·29 claims
0899US10858460B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Dec 8, 2020·8 cites·21 claims
0999US10513570B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted Dec 24, 2019·34 cites·13 claims
1099US10323109B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted Jun 18, 2019·39 cites·24 claims
1198US11583841B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Feb 21, 2023·2 cites·20 claims
1298US11583840B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Feb 21, 2023·2 cites·20 claims
1398US11542348B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Jan 3, 2023·2 cites·20 claims
1498US11117122B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Sep 14, 2021·4 cites·9 claims
1598US11110443B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Sep 7, 2021·5 cites·7 claims
1698US10988557B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Apr 27, 2021·3 cites·20 claims
1798US10894250B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Jan 19, 2021·9 cites·20 claims
1898US10894249B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Jan 19, 2021·8 cites·23 claims
1998US10722874B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Jul 28, 2020·25 cites·17 claims
2098US10669362B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2019·Granted Jun 2, 2020·12 cites·20 claims
2198US10543480B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2018·Granted Jan 28, 2020·35 cites·20 claims
2298US10323108B2Long chain branched polymers and methods of making sameCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2016·Granted Jun 18, 2019·25 cites·28 claims
2398US10287369B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted May 14, 2019·57 cites·20 claims
2498US10213766B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2015·Granted Feb 26, 2019·58 cites·14 claims
2598US9988468B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2016·Granted Jun 5, 2018·67 cites·29 claims
2698US9879101B2Long chain branched polymers and methods of making sameCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted Jan 30, 2018·23 cites·22 claims
2798US9796798B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2016·Granted Oct 24, 2017·57 cites·20 claims
2898US9598513B2Long chain branched polymers and methods of making sameCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2015·Granted Mar 21, 2017·32 cites·20 claims
2998US9587048B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2015·Granted Mar 7, 2017·43 cites·28 claims
3098US9505856B1Methods for making fluorided chromium (VI) catalysts, and polymerization processes using the sameCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2016·Granted Nov 29, 2016·20 cites·19 claims
3197US11912809B2High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerizationCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2023·Granted Feb 27, 2024·5 cites·16 claims
3297US11512154B2Particle size control of supported chromium catalysts in loop slurry polymerization reactorsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Nov 29, 2022·2 cites·28 claims
3397US11384179B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2021·Granted Jul 12, 2022·2 cites·18 claims
3497US11358131B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2021·Granted Jun 14, 2022·2 cites·12 claims
3597US11358132B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2021·Granted Jun 14, 2022·2 cites·12 claims
3697US11267914B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Mar 8, 2022·3 cites·19 claims
3797US10300460B1Aqueous methods for titanating a chromium/silica catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted May 28, 2019·11 cites·27 claims
3897US9023967B2Long chain branched polymers and methods of making sameYU YOULU·Filed 2011·Granted May 5, 2015·47 cites·14 claims
3996US12146018B2High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerizationCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2024·Granted Nov 19, 2024·1 cites·22 claims
4096US11266976B2Methods of preparing a catalyst with low HRVOC emissionsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2018·Granted Mar 8, 2022·5 cites·20 claims
4195US12351670B2Modifications of sulfated bentonites and uses thereof in metallocene catalyst systems for olefin polymerizationCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2024·Granted Jul 8, 2025·1 cites·12 claims
4295US11999814B2Modifications of sulfated bentonites and uses thereof in metallocene catalyst systems for olefin polymerizationCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Jun 4, 2024·1 cites·24 claims
4395US11674023B2Polymer composition and methods of making and using sameCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2020·Granted Jun 13, 2023·2 cites·22 claims
4495US10654953B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted May 19, 2020·37 cites·27 claims
4594US11753356B2Methods for operating ethylene oligomerization reactor systems with an integrated ultrasonic flow meterCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2022·Granted Sep 12, 2023·2 cites·22 claims
4694US11572324B1Methods for operating ethylene oligomerization reactor systems with an integrated ultrasonic flow meterCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2021·Granted Feb 7, 2023·2 cites·15 claims
4794US11220564B2Methods of preparing a catalystCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2019·Granted Jan 11, 2022·3 cites·20 claims
4894US10821428B2Methods of preparing a catalyst utilizing hydrated reagentsCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2019·Granted Nov 3, 2020·4 cites·20 claims
4993US12319770B2High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerizationCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2024·Granted Jun 3, 2025·0 cites·18 claims
5093US10549251B2System and method for monitoring and controlling a polymerization systemCHEVRON PHILLIPS CHEMICAL CO LP·Filed 2017·Granted Feb 4, 2020·3 cites·20 claims

Showing the top 50 of 78 patent records by PatentIndex Score.

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →