Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Eric D. Schwerdtfeger — 75 Patents

Chevron: 75 patents #20 of 4,788Top 1%
Bartlesville, OK: #12 of 1,143 inventorsTop 2%
Oklahoma: #45 of 12,736 inventorsTop 1%
Overall (All Time): #25,505 of 4,157,543Top 1%
75 Patents All Time
Eric D. Schwerdtfeger has been granted 75 US patents while listed as an inventor at Chevron. The first was granted in 2013 and the most recent in July 2025. Eric D. Schwerdtfeger ranks #25,505 of 4,157,543 US inventors in our database (top 0.61%). Patent records list Eric D. Schwerdtfeger in Bartlesville, OK, US.

Patents per Year

Patents granted per year, 2013 to 2025Bar chart with a peak of 15 patents in 2022.peak 152013: 1 patents20132015: 2 patents2016: 3 patents20162017: 3 patents2018: 3 patents20182019: 6 patents2020: 10 patents20202021: 9 patents2022: 15 patents20222023: 11 patents2024: 9 patents20242025: 3 patents2025

Issued Patents All Time

Showing 1–25 of 75 patents

Patent #TitleCo-InventorsDate
12351670 Modifications of sulfated bentonites and uses thereof in metallocene catalyst systems for olefin polymerization Max P. McDaniel, Qing Yang, Ryan N. Rose, Kathy S. Clear, Graham R. Lief +3 more 2025-07-08
12319774 Particle size control of silyl chromate catalysts and uses thereof in fluidized bed reactors Max P. McDaniel, Jeffrey S. Lowell, Scott E. Kufeld 2025-06-03
12319770 High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerization Max P. McDaniel, Qing Yang, Carlos A. Cruz, Jinping Zhou, Anand Ramanathan +2 more 2025-06-03
12161997 Aqueous methods for titanating a chromium/silica catalyst Max P. McDaniel, Kathy S. Clear, Jeremy M. Praetorius 2024-12-10
12146018 High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerization Max P. McDaniel, Qing Yang, Carlos A. Cruz, Jinping Zhou, Anand Ramanathan +2 more 2024-11-19
12037483 Polymer composition and methods of making and using same Youlu Yu, Jeffrey S. Fodor, David A. Soules 2024-07-16
12024479 Methods for operating ethylene oligomerization reactor systems with an integrated ultrasonic flow meter Bruce E. Kreischer, Kendall M. Hurst, Steven M. Bischof, Jared T. Fern, Kent E. Mitchell +1 more 2024-07-02
12005425 Methods of preparing a catalyst with low HRVOC emissions Max P. McDaniel, Kathy S. Clear, Jeremy M. Praetorius 2024-06-11
11999814 Modifications of sulfated bentonites and uses thereof in metallocene catalyst systems for olefin polymerization Max P. McDaniel, Qing Yang, Ryan N. Rose, Kathy S. Clear, Graham R. Lief +3 more 2024-06-04
11999807 Particle size control of supported chromium catalysts in loop slurry polymerization reactors Max P. McDaniel, Carlton E. Ash, Kathy S. Clear, Carlos A. Cruz, Jeremy M. Praetorius 2024-06-04
11976142 Methods of preparing a catalyst Max P. McDaniel, Jeremy M. Praetorius 2024-05-07
11912809 High porosity fluorided silica-coated alumina activator-supports and uses thereof in metallocene-based catalyst systems for olefin polymerization Max P. McDaniel, Qing Yang, Carlos A. Cruz, Jinping Zhou, Anand Ramanathan +2 more 2024-02-27
11814457 Particle size control of metallocene catalyst systems in loop slurry polymerization reactors Max P. McDaniel, Carlton E. Ash, Kathy S. Clear, Carlos A. Cruz, Jeremy M. Praetorius 2023-11-14
11814449 Particle size control of supported chromium catalysts in loop slurry polymerization reactors Max P. McDaniel, Carlton E. Ash, Kathy S. Clear, Carlos A. Cruz, Jeremy M. Praetorius +1 more 2023-11-14
11801490 Methods of preparing a catalyst Jeremy M. Praetorius, Max P. McDaniel, Ted H. Cymbaluk, Connor D. Boxell, Alan L. Solenberger +1 more 2023-10-31
11753356 Methods for operating ethylene oligomerization reactor systems with an integrated ultrasonic flow meter Bruce E. Kreischer, Kendall M. Hurst, Steven M. Bischof, Jared T. Fern, Kent E. Mitchell +1 more 2023-09-12
11697697 Methods of preparing a catalyst Max P. McDaniel, Jeremy M. Praetorius 2023-07-11
11674023 Polymer composition and methods of making and using same Youlu Yu, Jeffrey S. Fodor, David A. Soules 2023-06-13
11634521 Particle size control of metallocene catalyst systems in loop slurry polymerization reactors Max P. McDaniel, Carlton E. Ash, Kathy S. Clear, Carlos A. Cruz, Jeremy M. Praetorius 2023-04-25
11583840 Methods of preparing a catalyst utilizing hydrated reagents Max P. McDaniel, Kathy S. Clear, Jeremy M. Praetorius, Mitchell D. Refvik, Mark L. Hlavinka 2023-02-21
11583841 Methods of preparing a catalyst utilizing hydrated reagents Max P. McDaniel, Kathy S. Clear, Jeremy M. Praetorius, Mitchell D. Refvik, Mark L. Hlavinka 2023-02-21
11572324 Methods for operating ethylene oligomerization reactor systems with an integrated ultrasonic flow meter Bruce E. Kreischer, Kendall M. Hurst, Steven M. Bischof, Jared T. Fern, Kent E. Mitchell +1 more 2023-02-07
11542348 Methods of preparing a catalyst Max P. McDaniel, Kathy S. Clear, Jeremy M. Praetorius 2023-01-03
11512154 Particle size control of supported chromium catalysts in loop slurry polymerization reactors Max P. McDaniel, Carlton E. Ash, Kathy S. Clear, Carlos A. Cruz, Jeremy M. Praetorius 2022-11-29
11492430 Particle size control of metallocene catalyst systems in loop slurry polymerization reactors Max P. McDaniel, Carlton E. Ash, Kathy S. Clear, Carlos A. Cruz, Jeremy M. Praetorius 2022-11-08