William Malcolm Calhoun — 4 Patents at Chevron

William Malcolm Calhoun has been granted 4 US patents while listed as an inventor at Chevron. The first was granted in 1992 and the most recent in August 2011. William Malcolm Calhoun ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list William Malcolm Calhoun in Englewood, CO, US.

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Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7991554	Method for predicting rate of penetration using bit-specific coefficients of sliding friction and mechanical efficiency as a function of confined compressive strength	Hector Ulpiano Caicedo, Russell Thomas Ewy	2011-08-02	$280,702,000
7555414	Method for estimating confined compressive strength for rock formations utilizing skempton theory	Russell Thomas Ewy	2009-06-30	$321,579,000
7412331	Method for predicting rate of penetration using bit-specific coefficient of sliding friction and mechanical efficiency as a function of confined compressive strength	Hector Ulpiano Caicedo, Russell Thomas Ewy	2008-08-12	$465,921,000
5144763	Stand for displaying computer keyboard function key guides	—	1992-09-08

William Malcolm Calhoun — 4 Patents

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