Cawthorne; Chris Edward

Patent Applications and Registrations

Patent applications and USPTO patent grants for Cawthorne; Chris Edward.The latest application filed is for "bearing and lubrication system for earth boring bit".

Company Profile

0.8.4

Cawthorne; Chris Edward - The Woodlands TX

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Bearing and lubrication system for earth boring bit Grant 7,237,627 - Richman , et al. July 3, 2	2007-07-03
Bearing and lubrication system for earth boring bit App 20050077087 - Richman, Lance T. ; et al.	2005-04-14
Dual-seal drill bit pressure communication system Grant 6,695,079 - Portwood , et al. February 24, 2	2004-02-24
Dual-seal drill bit pressure communication system Grant 6,679,342 - Portwood , et al. January 20, 2	2004-01-20
Dual-seal drill bit pressure communication system App 20030019666 - Portwood, Gary Ray ; et al.	2003-01-30
Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty Grant 6,510,909 - Portwood , et al. January 28, 2	2003-01-28
Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty App 20020153171 - Portwood, Gary Ray ; et al.	2002-10-24
Dual-seal drill bit pressure communication system App 20020153172 - Portwood, Gary Ray ; et al.	2002-10-24
Dual-seal drill bit pressure communication system Grant 6,431,293 - Portwood , et al. August 13, 2	2002-08-13
Sealed bearing drill bit with dual-seal configuration Grant 6,033,117 - Cariveau , et al. March 7, 2	2000-03-07
Rolling cone bit having gage and nestled gage cutter elements having enhancements in materials and geometry to optimize borehole corner cutting duty Grant 5,967,245 - Garcia , et al. October 19, 1	1999-10-19
Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty Grant 5,833,020 - Portwood , et al. November 10, 1	1998-11-10

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