| Patent | Date |
|---|
Dual-edge working surfaces for polycrystalline diamond cutting elements
Grant 7,568,534 - Griffin , et al. August 4, 2 | 2009-08-04 |
Multi-Edge Working Surfaces for Polycrystalline Diamond Cutting Elements
App 20080142267 - Griffin; Nigel Dennis ; et al. | 2008-06-19 |
Dual-Edge Working Surfaces for Polycrystalline Diamond Cutting Elements
App 20080142275 - Griffin; Nigel Dennis ; et al. | 2008-06-19 |
Dual-Edge Working Surfaces for Polycrystalline Diamond Cutting Elements
App 20060086540 - Griffin; Nigel Dennis ; et al. | 2006-04-27 |
Rotary seal for directional drilling tools
Grant 6,962,214 - Hughes , et al. November 8, 2 | 2005-11-08 |
Polycrystalline Diamond Partially Depleted of Catalyzing Material
App 20050129950 - Griffin, Nigel Dennis ; et al. | 2005-06-16 |
High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing Material
App 20050115744 - Griffin, Nigel Dennis ; et al. | 2005-06-02 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,878,447 - Griffin , et al. April 12, 2 | 2005-04-12 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,861,098 - Griffin , et al. March 1, 2 | 2005-03-01 |
High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
Grant 6,861,137 - Griffin , et al. March 1, 2 | 2005-03-01 |
Method of making polycrystalline diamond with working surfaces depleted of catalyzing material
Grant 6,797,326 - Griffin , et al. September 28, 2 | 2004-09-28 |
High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing Material
App 20040115435 - Griffin, Nigel Dennis ; et al. | 2004-06-17 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,749,033 - Griffin , et al. June 15, 2 | 2004-06-15 |
Polycrystalline Diamond Partially Depleted Of Catalyzing Material
App 20040105806 - Griffin, Nigel Dennis ; et al. | 2004-06-03 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,739,214 - Griffin , et al. May 25, 2 | 2004-05-25 |
Cutter and method of manufacture thereof
App 20040007394 - Griffin, Nigel Dennis | 2004-01-15 |
Cutter and method of manufacture thereof
App 20040007393 - Griffin, Nigel Dennis | 2004-01-15 |
Polycrystalline Diamond Partially Depleted Of Catalyzing Material
App 20030235691 - Griffin, Nigel Dennis ; et al. | 2003-12-25 |
Polycrystalline Material Element with Improved Wear Resistance And Methods of Manufacture Thereof
App 20030183426 - Griffin, Nigel Dennis ; et al. | 2003-10-02 |
Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength
Grant 6,601,662 - Matthias , et al. August 5, 2 | 2003-08-05 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,592,985 - Griffin , et al. July 15, 2 | 2003-07-15 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,589,640 - Griffin , et al. July 8, 2 | 2003-07-08 |
Polycrystalline diamond partially depleted of catalyzing material
Grant 6,585,064 - Griffin , et al. July 1, 2 | 2003-07-01 |
High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
Grant 6,562,462 - Griffin , et al. May 13, 2 | 2003-05-13 |
High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
Grant 6,544,308 - Griffin , et al. April 8, 2 | 2003-04-08 |
Polycrystalline diamond partially depleted of catalyzing material
App 20030037640 - Griffin, Nigel Dennis ; et al. | 2003-02-27 |
Polycrystalline diamond partially depleted of catalyzing material
App 20030035958 - Griffin, Nigel Dennis ; et al. | 2003-02-20 |
Polycrystalline diamond partially depleted of catalyzing material
App 20030035957 - Griffin, Nigel Dennis ; et al. | 2003-02-20 |
Polycrystalline diamond partially depleted of catalyzing material
App 20030034182 - Griffin, Nigel Dennis ; et al. | 2003-02-20 |
Methods of treating preform elements
Grant 6,517,902 - Drake , et al. February 11, 2 | 2003-02-11 |
Method of making polycrystalline diamond with working surfaces depleted of catalyzing material
App 20030021995 - Griffin, Nigel Dennis ; et al. | 2003-01-30 |
Rotary drill bit
Grant 6,481,511 - Matthias , et al. November 19, 2 | 2002-11-19 |
Rotary seal for directional drilling tools
App 20020139584 - Hughes, Peter Raymond ; et al. | 2002-10-03 |
Cutting elements for rotary drill bits
Grant 6,439,327 - Griffin , et al. August 27, 2 | 2002-08-27 |
Rotary drill bit design method
Grant 6,435,058 - Matthias , et al. August 20, 2 | 2002-08-20 |
Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strength
App 20020074168 - Matthias, Terry R. ; et al. | 2002-06-20 |
High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
App 20020045059 - Griffin, Nigel Dennis ; et al. | 2002-04-18 |
High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
App 20020034631 - Griffin, Nigel Dennis ; et al. | 2002-03-21 |
Rotary drill bit design method
App 20020033077 - Griffin, Nigel Dennis ; et al. | 2002-03-21 |
Polycrystalline diamond partially depleted of catalyzing material
App 20020034632 - Griffin, Nigel Dennis ; et al. | 2002-03-21 |
Rotary drill bit
App 20020033282 - Griffin, Nigel Dennis ; et al. | 2002-03-21 |
Machining of polycrystalline diamond
App 20020033383 - Griffin, Nigel Dennis ; et al. | 2002-03-21 |
Methods of treating preform elements
App 20010049019 - Drake, Eric F. ; et al. | 2001-12-06 |
Cutting elements for rotary drill bits
Grant 6,269,894 - Griffin August 7, 2 | 2001-08-07 |
Cutting elements and methods of manufacture thereof
Grant 6,248,447 - Griffin , et al. June 19, 2 | 2001-06-19 |
Preform cutting elements for rotary drag-type drill bits
Grant 6,145,607 - Griffin , et al. November 14, 2 | 2000-11-14 |
Rotary drill bit having moveable formation-engaging members
Grant 6,142,250 - Griffin , et al. November 7, 2 | 2000-11-07 |
Preform elements and mountings therefor
Grant 6,131,678 - Griffin October 17, 2 | 2000-10-17 |
Elements faced with superhard material
Grant 6,077,591 - Griffin June 20, 2 | 2000-06-20 |
Preform cutting elements for rotary drill bits
Grant 6,065,554 - Taylor , et al. May 23, 2 | 2000-05-23 |
Methods of treating preform elements including polycrystalline diamond bonded to a substrate
Grant 6,056,911 - Griffin May 2, 2 | 2000-05-02 |
Elements faced with superhard material
Grant 5,669,271 - Griffin , et al. September 23, 1 | 1997-09-23 |
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