John L. Evans has been granted 10 US patents while listed as an inventor at ExxonMobil . The first was granted in 1983 and the most recent in August 2011. John L. Evans ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list John L. Evans in Camberley, TX, GB.
Patents per Year Patents granted per year, 1983 to 2011 Bar chart with a peak of 2 patents in 1985. peak 2 1983: 1 patents 1983 1984: 1 patents 1984 1985: 2 patents 1985 1986: 1 patents 1986 1988: 1 patents 1988 1989: 1 patents 1989 1991: 1 patents 1991 1995: 1 patents 1995 2011: 1 patents 2011
Issued Patents All Time
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Showing 1–10 of 10 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
7993573 Slag transport and dumping apparatus and method Bogdan Z. Charczuk 2011-08-09
5438513 Automotive electronics test system Neil L. Borkowicz , David S. Meir , Robert W. Johnson 1995-08-01
$161,247,000
5038099 Radial air-core gauge Paul A. Markow , William Nolle , Hugo A. Jenrath , Alfred H. Glover , Joseph T. Betterton 1991-08-06
$4,489,000
4821836 Vehicle integral speedometer and automatic door lock system — 1989-04-18
$3,695,000
4728920 Pressure transducer William Douglas McKee , Joseph T. Betterton , Alfred H. Glover , Thomas S. McKee 1988-03-01
$46,224,000
4570353 Magnetic single shot inclinometer Larry R. Russell 1986-02-18
$76,028,000
4553429 Method and apparatus for monitoring fluid flow between a borehole and the surrounding formations in the course of drilling operations George F. Gehrig , Jerry M. Speers 1985-11-19
$25,694,000
4506738 Liquid-projecting monitor Kuldip S. Bains 1985-03-26
$3,534,000
4440239 Method and apparatus for controlling the flow of drilling fluid in a wellbore — 1984-04-03
$11,935,000
4392618 Liquid-projecting monitor Kuldip S. Bains 1983-07-12
$5,130,000
