Jack Castle — 2 Patents at ExxonMobil

Jack Castle has been granted 2 US patents while listed as an inventor at ExxonMobil. The first was granted in 1992 and the most recent in June 2005. Jack Castle ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Jack Castle in Crowley, TX, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6904984	Stepped polycrystalline diamond compact insert	Roy D. Estes	2005-06-14
5145017	Kerf-cutting apparatus for increased drilling rates	Jesse L. Holster, Roy D. Estes, Paul G. Parys	1992-09-08	$50,172,000

Jack Castle — 2 Patents

Issued Patents All Time

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