JH

James E. Hein

Chevron: 20 patents #194 of 4,788Top 5%
PP Phillips Petroleum: 1 patents #819 of 1,401Top 60%
Overall (All Time): #201,692 of 4,157,543Top 5%
21
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12297310 Methods for chromium catalyst activation using oxygen-enriched fluidization gas Ralph W. Romig, Troy Bretz, Zhihui Gu 2025-05-13
12115506 Catalyst slurry mixing process and system Scott E. Kufeld 2024-10-15
12076700 Loop slurry reactor cooling processes and systems Reza Khankal, Anurag Gupta, Enrique Mancillas, Timothy O. Odi 2024-09-03
11833479 Catalyst slurry mixing process and system Scott E. Kufeld 2023-12-05
11673975 System and method for improving dump tank purge time Bradley T. Price, Jamie N. Sutherland, Joseph A. Curren 2023-06-13
11584806 Methods for chromium catalyst activation using oxygen-enriched fluidization gas Ralph W. Romig, Troy Bretz, Zhihui Gu 2023-02-21
11578145 System and method for rapid dump tank heating Joseph A. Curren, Ralph W. Romig, Ai-Fu Chang 2023-02-14
11254761 Catalyst pretreatment and feeding system for polypropylene production Reza Khankal, Joel A. Mutchler, Bryan M. Garner 2022-02-22
11021549 System and method for rapid dump tank heating Joseph A. Curren, Ralph W. Romig, Ai-Fu Chang 2021-06-01
9610558 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2017-04-04
9221920 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2015-12-29
8765884 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2014-07-01
8569433 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2013-10-29
8303899 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2012-11-06
8128877 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2012-03-06
8017701 Energy efficient polyolefin process Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns +6 more 2011-09-13
7999044 System and method for deinventory of polymerization reactor John D. Hottovy, John H. Tait, David H. Burns, Donald W. Verser 2011-08-16
7179426 Large catalyst activator John D. Hottovy, Dale A. Zellers 2007-02-20
6815511 Continuous withdrawal from high solids slurry polymerization Donald W. Verser, David H. Burns, George K. Rajaendran, John D. Hottovy 2004-11-09
6753387 Temperature controlling system for olefin polymerization reactors John H. Tait, Rajinder Sharma, Gary A. Marek 2004-06-22
6045661 Process and apparatus for recovering diluent, monomer, and comonomer from a polymerization reactor effluent Bruce E. Kreischer, Donald W. Verser 2000-04-04