Farquharson; Keith D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Farquharson; Keith D..The latest application filed is for "metal seal for wellheads".
- Farquharson; Keith D. - Edmonton CA
| Patent | Date |
|---|---|
| Metal seal for wellheads Grant 8,066,061 - Farquharson , et al. November 29, 2 | 2011-11-29 |
| Metal Seal For Wellheads App 20090266558 - Farquharson; Keith D. ; et al. | 2009-10-29 |
| Wellhead stuffing box support assembly Grant 6,637,509 - Farquharson , et al. October 28, 2 | 2003-10-28 |
| Wellhead stuffing box support assembly App 20030127220 - Farquharson, Keith D. ; et al. | 2003-07-10 |
| Wellhead production pumping tree Grant 6,457,530 - Lam , et al. October 1, 2 | 2002-10-01 |
| Wellhead Production Pumping Tree App 20020134548 - Lam, Tony M. ; et al. | 2002-09-26 |
| Hydraulic blowout preventer assembly for production wellhead Grant 6,260,817 - Lam , et al. July 17, 2 | 2001-07-17 |
| Composite pumping tree with integral shut-off valve Grant 6,176,466 - Lam , et al. January 23, 2 | 2001-01-23 |
| Piston-type check valve with diffuser Grant 5,921,276 - Lam , et al. July 13, 1 | 1999-07-13 |
| Integral wellhead assembly for pumping wells Grant 5,743,332 - Lam , et al. April 28, 1 | 1998-04-28 |
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