Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Ralph E. Killen — 4 Patents

Chevron: 4 patents #1,084 of 4,788Top 25%
San Francisco, CA: #9,676 of 26,999 inventorsTop 40%
California: #126,026 of 386,348 inventorsTop 35%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Ralph E. Killen has been granted 4 US patents while listed as an inventor at Chevron. The first was granted in 2012 and the most recent in December 2013. Ralph E. Killen ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Ralph E. Killen in San Francisco, CA, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8597595 Multiphase contact and distribution apparatus for hydroprocessing Zackory Akin, Craig Boyak, Abdenour Kemoun, Krishniah Parimi, Steven Xuqi Song +1 more 2013-12-03 $132,547,000
8372354 Multiphase contact and distribution apparatus for hydroprocessing Craig Boyak, Steven Xuqi Song, Abdenour Kemoun, Steve Souers, Krishniah Parimi +1 more 2013-02-12 $97,170,000
8211375 Flow distribution device for downflow catalytic reactors Krishniah Parimi, Steven Xuqi Song, Ronald K. Meeker, Steven Alden Souers 2012-07-03 $226,738,000
8202498 Multiphase contact and distribution apparatus for hydroprocessing Craig Boyak, Steven Xuqi Song, Abdenour Kemoun, Steve Souers, Krishniah Parimi +1 more 2012-06-19 $154,853,000