Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
RM

Robert R. McElvain — 20 Patents

Chevron: 19 patents #204 of 4,788Top 5%
PPPhillips Petroleum: 1 patents #1,776 of 2,506Top 75%
Kingwood, TX: #64 of 726 inventorsTop 9%
Texas: #6,926 of 125,132 inventorsTop 6%
Overall (All Time): #214,803 of 4,157,543Top 6%
20 Patents All Time
Robert R. McElvain has been granted 20 US patents while listed as an inventor at Chevron. The first was granted in 1991 and the most recent in April 2024. Robert R. McElvain ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list Robert R. McElvain in Kingwood, TX, US.

Patents per Year

Patents granted per year, 1991 to 2024Bar chart with a peak of 3 patents in 2012.peak 31991: 1 patents19912006: 1 patents2009: 2 patents20092011: 1 patents2012: 3 patents20122013: 1 patents2014: 1 patents20142015: 1 patents2016: 1 patents20162017: 2 patents2019: 1 patents20192020: 2 patents2022: 1 patents20222023: 1 patents2024: 1 patents2024

Issued Patents All Time

Showing 1–20 of 20 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11969725 Reactor jacket design Anurag Gupta, Scott E. Kufeld, Larry W. Ezell, Robert F. Parrott, Joel A. Mutchler 2024-04-30
11623176 Nitrogen conservation in polymerization processes Lei Ji, Gregory G. Hendrickson, Steven D. Bridges, Jennifer F. Drew 2023-04-11
11478768 Reactor jacket design Anurag Gupta, Scott E. Kufeld, Larry W. Ezell, Robert F. Parrott 2022-10-25
10792609 Nitrogen conservation in polymerization processes Lei Ji, Gregory G. Hendrickson, Steven D. Bridges, Jennifer F. Drew 2020-10-06
10611863 Polymerization catalyst delivery Anurag Gupta, Anne M Balinsky, John D. Stewart 2020-04-07
10179826 Polymerization catalyst delivery Anurag Gupta, Anne M Balinsky, John D. Stewart 2019-01-15
9687815 Treater regeneration Ralph W. Romig, Steve E. Page 2017-06-27
9610558 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2017-04-04
9289748 Treater regeneration Ralph W. Romig, Steve E. Page 2016-03-22
9221920 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2015-12-29
8765884 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2014-07-01
8569433 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2013-10-29
8303899 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2012-11-06
8202949 System and method for measuring pressure and flow in a loop reactor John D. Hottovy, Larry W. Ezell, Anurag Gupta 2012-06-19
8128877 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2012-03-06
8017701 Energy efficient polyolefin process John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait +6 more 2011-09-13
7547750 Apparatus and method for removing polymer solids from slurry loop reactor John D. Hottovy, David H. Burns, Donald W. Verser, Anurag Gupta, Ralph W. Romig 2009-06-16
7517947 Polymer transfer within a polymerization system John D. Hottovy, Bryan M. Garner, Gregory G. Hendrickson, John H. Tait 2009-04-14
7109290 Polymer transfer within a polymerization system John D. Hottovy, Bryan M. Garner, Gregory G. Hendrikson, John H. Tait 2006-09-19
5071927 High-temperature slurry polymerization of ethylene Elizabeth A. Benham, Max P. McDaniel, Roy O. Schneider 1991-12-10 $6,827,000