Keshavan; Madapusi K.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Keshavan; Madapusi K..The latest application filed is for "cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements".

Company Profile

5.119.87

Keshavan; Madapusi K. - Oceanside CA
Keshavan; Madapusi K. - The Woodlands TX
Keshavan; Madapusi K - The Woodlands TX US
Keshavan; Madapusi K. - Sandy UT
Keshavan; Madapusi K. - Irvine CA
Keshavan; Madapusi K. - Fullerton CA
Keshavan; Madapusi K. - Indianapolis IN

*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
Metal matrix composite material for additive manufacturing of downhole tools Grant 11,313,176 - Griffo , et al. April 26, 2	2022-04-26
Cutting Elements Having Non-planar Surfaces And Downhole Cutting Tools Using Such Cutting Elements App 20220112773 - Chen; Chen ; et al.	2022-04-14
Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements Grant 11,215,012 - Chen , et al. January 4, 2	2022-01-04
Tungsten tetraboride composite matrix and uses thereof Grant 11,174,538 - Kaner , et al. November 16, 2	2021-11-16
Polycrystalline diamond cutting elements with transition zones and downhole cutting tools incorporating the same Grant 11,156,036 - Keshavan , et al. October 26, 2	2021-10-26
Rolling cutter Grant RE48,455 - Shen , et al. March 2, 2	2021-03-02
Cutting Elements Having Non-planar Surfaces And Downhole Cutting Tools Using Such Cutting Elements App 20190264511 - Chen; Chen ; et al.	2019-08-29
Cutting structures for fixed cutter drill bit and other downhole cutting tools Grant 10,309,156 - Azar , et al.	2019-06-04
Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements Grant 10,287,825 - Chen , et al. May 14, 2	2019-05-14
Polycrystalline Diamond Cutting Elements With Transition Zones And Downhole Cutting Tools Incorporating The Same App 20190136636 - Keshavan; Madapusi K. ; et al.	2019-05-09
Metal Matrix Composite Material For Additive Manufacturing Of Downhole Tools App 20190128072 - Griffo; Anthony ; et al.	2019-05-02
Rolling cutter Grant RE47,369 - Shen , et al.	2019-04-30
Cemented carbide composite for a downhole tool Grant 10,267,095 - Keshavan	2019-04-23
Polycrystalline diamond cutting elements with transition zones and downhole cutting tools incorporating the same Grant 10,174,561 - Hall , et al. J	2019-01-08
Downhole tool for increasing a wellbore diameter Grant 10,156,097 - Keshavan , et al. Dec	2018-12-18
Polycrystalline diamond constructions having improved thermal stability Grant 10,132,121 - Keshavan , et al. November 20, 2	2018-11-20
Polycrystalline diamond constructions having improved thermal stability Grant 10,124,468 - Keshavan , et al. November 13, 2	2018-11-13
Tungsten Tetraboride Composite Matrix And Uses Thereof App 20180223397 - Kaner; Richard B. ; et al.	2018-08-09
Cutting structures for fixed cutter drill bit and other downhole cutting tools Grant 10,030,452 - Azar , et al. July 24, 2	2018-07-24
Coating on PDC/TSP cutter for accelerated leaching Grant 9,776,917 - Tessitore , et al. October 3, 2	2017-10-03
Cemented Carbide Composite For A Downhole Tool App 20160230470 - Keshavan; Madapusi K.	2016-08-11
Cutting structures for fixed cutter drill bit and other downhole cutting tools Grant 9,404,312 - Azar , et al. August 2, 2	2016-08-02
Cemented carbide composite for a downhole tool Grant 9,393,674 - Keshavan July 19, 2	2016-07-19
Manufacture of thermally stable cutting elements Grant 9,387,571 - Griffo , et al. July 12, 2	2016-07-12
Additive Manufacturing Of Composite Molds App 20160185009 - Keshavan; Madapusi K. ; et al.	2016-06-30
Kerfing hybrid drill bit and other downhole cutting tools Grant 9,366,090 - Azar , et al. June 14, 2	2016-06-14
Coating On Pdc/tsp Cutter For Accelerated Leaching App 20150321952 - Tessitore; Ted ; et al.	2015-11-12
Cutting Elements Having Non-planar Surfaces And Downhole Cutting Tools Using Such Cutting Elements App 20150259988 - CHEN; Chen ; et al.	2015-09-17
Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same Grant 9,115,553 - Zhang , et al. August 25, 2	2015-08-25
Polycrystalline diamond composites Grant 9,097,074 - Shen , et al. August 4, 2	2015-08-04
Rolling cutter Grant 9,033,070 - Shen , et al. May 19, 2	2015-05-19
Polycrystalline Diamond Cutting Elements With Transition Zones And Downhole Cutting Tools Incorporating The Same App 20150129322 - Hall; David R. ; et al.	2015-05-14
Downhole Tool For Increasing A Wellbore Diameter App 20150068804 - KESHAVAN; MADAPUSI K. ; et al.	2015-03-12
Ball hole welding using the friction stir welding (FSW) process Grant 8,955,734 - Steel , et al. February 17, 2	2015-02-17
Polycrystalline Diamond Materials Having Improved Abrasion Resistance, Thermal Stability And Impact Resistance App 20150021101 - Keshavan; Madapusi K. ; et al.	2015-01-22
Cutting Structures For Fixed Cutter Drill Bit And Other Downhole Cutting Tools App 20140367178 - Azar; Michael G. ; et al.	2014-12-18
Rolling Cutter App 20140345951 - Shen; Yuelin ; et al.	2014-11-27
High strength infiltrated matrix body using fine grain dispersions Grant 8,893,828 - Lockwood , et al. November 25, 2	2014-11-25
Cutting structures for fixed cutter drill bit and other downhole cutting tools Grant 8,887,837 - Azar , et al. November 18, 2	2014-11-18
Atomic layer deposition nanocoatings on cutting tool powder materials Grant 8,875,813 - Zhan , et al. November 4, 2	2014-11-04
Cemented Carbide Composite For A Downhole Tool App 20140298728 - Keshavan; Madapusi K.	2014-10-09
Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance Grant 8,852,546 - Keshavan , et al. October 7, 2	2014-10-07
Cutting Structures For Fixed Cutter Drill Bit And Other Downhole Cutting Tools App 20140262544 - Azar; Michael G. ; et al.	2014-09-18
Cutting Structures For Fixed Cutter Drill Bit And Other Downhole Cutting Tools App 20140262545 - Azar; Michael G. ; et al.	2014-09-18
Rolling cutter Grant 8,800,691 - Shen , et al. August 12, 2	2014-08-12
Methods of making and attaching TSP material for forming cutting elements, cutting elements having such TSP material and bits incorporating such cutting elements Grant 8,771,389 - Keshavan , et al. July 8, 2	2014-07-08
Methods of hardbanding joints of pipe using friction stir welding Grant 8,763,881 - Keshavan , et al. July 1, 2	2014-07-01
Method of designing a bottom hole assembly and a bottom hole assembly Grant 8,752,656 - Zhang , et al. June 17, 2	2014-06-17
Ball Hole Welding Using The Friction Stir Welding (fsw) Process App 20140034394 - Steel; Russell J. ; et al.	2014-02-06
Cutting Elements With Re-processed Thermally Stable Polycrystalline Diamond Cutting Layers, Bits Incorporating The Same, And Methods Of Making The Same App 20140034396 - ZHANG; YOUHE ; et al.	2014-02-06
Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same Grant 8,590,130 - Zhang , et al. November 26, 2	2013-11-26
Manufacture Of Thermally Stable Cutting Elements App 20130283701 - Griffo; Anthony ; et al.	2013-10-31
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Grant 8,567,534 - Zhang , et al. October 29, 2	2013-10-29
Cutting Structures For Fixed Cutter Drill Bit And Other Downhole Cutting Tools App 20130277120 - Azar; Michael G. ; et al.	2013-10-24
Hardmetal for use in oil and gas drilling applications Grant 8,561,731 - Keshavan , et al. October 22, 2	2013-10-22
Rolling Cutter App 20130220707 - Shen; Yuelin ; et al.	2013-08-29
Kerfing Hybrid Drill Bit And Other Downhole Cutting Tools App 20130220706 - Azar; Michael ; et al.	2013-08-29
Ultra-hard composite constructions comprising high-density diamond surface Grant 8,499,861 - Keshavan , et al. August 6, 2	2013-08-06
Manufacture of thermally stable cutting elements Grant 8,470,060 - Griffo , et al. June 25, 2	2013-06-25
Method of forming surface coatings on cutting elements Grant 8,414,986 - Keshavan April 9, 2	2013-04-09
Rolling cutter Grant 8,413,746 - Shen , et al. April 9, 2	2013-04-09
Polycrystalline Diamond Materials Having Improved Abrasion Resistance, Thermal Stability And Impact Resistance App 20130067827 - Keshavan; Madapusi K. ; et al.	2013-03-21
Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance Grant 8,309,050 - Keshavan , et al. November 13, 2	2012-11-13
Coating On Pdc/tsp Cutter For Accelerated Leaching App 20120247841 - Tessitore; Ted ; et al.	2012-10-04
Cutting Structures For Fixed Cutter Drill Bit And Other Downhole Cutting Tools App 20120234610 - Azar; Michael G. ; et al.	2012-09-20
Kerfing Hybrid Drill Bit And Other Downhole Cutting Tools App 20120205163 - Azar; Michael G. ; et al.	2012-08-16
Thermally Stable Polycrystalline Diamond Cutting Elements And Bits Incorporating The Same App 20120199401 - Zhang; Youhe ; et al.	2012-08-09
Cutting structures Grant 8,197,936 - Keshavan June 12, 2	2012-06-12
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Grant 8,157,029 - Zhang , et al. April 17, 2	2012-04-17
Rolling Cutter App 20120073881 - Shen; Yuelin ; et al.	2012-03-29
Rolling cutter Grant 8,091,655 - Shen , et al. January 10, 2	2012-01-10
Thermally stable ultra-hard material compact constructions Grant 8,066,087 - Griffo , et al. November 29, 2	2011-11-29
Polycrystalline Diamond Constructions Having Improved Thermal Stability App 20110247278 - Keshavan; Madapusi K. ; et al.	2011-10-13
Polycrystalline diamond constructions having improved thermal stability Grant 8,028,771 - Keshavan , et al. October 4, 2	2011-10-04
Manufacture Of Thermally Stable Cutting Elements App 20110232200 - Griffo; Anthony ; et al.	2011-09-29
Thermally stable polycrystalline diamond materials, cutting elements incorporating the same and bits incorporating such cutting elements Grant 8,020,644 - Keshavan September 20, 2	2011-09-20
Manufacture of thermally stable cutting elements Grant 8,002,859 - Griffo , et al. August 23, 2	2011-08-23
Novel Hardmetal For Use In Oil And Gas Drilling Applications App 20110168454 - Keshavan; Madapusi K. ; et al.	2011-07-14
High Strength Infiltrated Matrix Body Using Fine Grain Dispersions App 20110120781 - Lockwood; Gregory T. ; et al.	2011-05-26
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Grant 7,946,363 - Zhang , et al. May 24, 2	2011-05-24
Polycrystalline diamond constructions having improved thermal stability Grant 7,942,219 - Keshavan , et al. May 17, 2	2011-05-17
Polycrystalline composites reinforced with elongated nanostructures Grant 7,862,634 - Belnap , et al. January 4, 2	2011-01-04
Method of forming impregnated diamond cutting structures Grant 7,845,059 - Lockwood , et al. December 7, 2	2010-12-07
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Grant 7,836,981 - Zhang , et al. November 23, 2	2010-11-23
Methods Of Making And Attaching Tsp Material For Forming Cutting Elements, Cutting Elements Having Such Tsp Material And Bits Incorporating Such Cutting Elements App 20100281782 - Keshavan; Madapusi K. ; et al.	2010-11-11
Cutting Elements With Re-processed Thermally Stable Polycrystalline Diamond Cutting Layers, Bits Incorporating The Same, And Methods Of Making The Same App 20100282519 - Zhang; Youhe ; et al.	2010-11-11
Thermally Stable Polycrystalline Diamond Cutting Elements And Bits Incorporating The Same App 20100270088 - Zhang; Youhe ; et al.	2010-10-28
Rolling Cutter App 20100219001 - Shen; Yuelin ; et al.	2010-09-02
Layered hardfacing, durable hardfacing for drill bits Grant 7,770,672 - Kembaiyan , et al. August 10, 2	2010-08-10
Thermally Stable Polycrystalline Diamond Materials, Cutting Elements Incorporating The Same And Bits Incorporating Such Cutting Elements App 20100192473 - Keshavan; Madapusi K.	2010-08-05
High performance rock bit grease Grant 7,749,947 - Griffo , et al. July 6, 2	2010-07-06
Method of Designing a Bottom Hole Assembly and a Bottom Hole Assembly App 20100155149 - Keshavan; Madapusi K. ; et al.	2010-06-24
Surface Coatings On Cutting Elements App 20100108403 - Keshavan; Madapusi K.	2010-05-06
Cutting element with canted interface surface and bit body incorporating the same Grant 7,703,560 - Eyre , et al. April 27, 2	2010-04-27
Rolling cutter Grant 7,703,559 - Shen , et al. April 27, 2	2010-04-27
Thermally stable polycrystalline diamond materials, cutting elements incorporating the same and bits incorporating such cutting elements Grant 7,694,757 - Keshavan April 13, 2	2010-04-13
Ball Hole Welding Using The Friction Stir Welding (fsw) Process App 20100078224 - Steel; Russell J. ; et al.	2010-04-01
Bit Leg Outer Surface Processing Using Friction Stir Welding (fsw) App 20100071961 - Steel; Russell J. ; et al.	2010-03-25
Methods Of Hardbanding Joints Of Pipe Using Friction Stir Welding App 20100038407 - Keshavan; Madapusi K. ; et al.	2010-02-18
Methods Of Treating Hardbanded Joints Of Pipe Using Friction Stir Processing App 20100038408 - Keshavan; Madapusi K. ; et al.	2010-02-18
Thermally Stable Polycrystalline Diamond Cutting Elements And Bits Incorporating The Same App 20090183925 - Zhang; Youhe ; et al.	2009-07-23
Thermally Stable Polycrystalline Diamond Cutting Elements And Bits Incorporating The Same App 20090178855 - Zhang; Youhe ; et al.	2009-07-16
Polycrystalline Diamond Constructions Having Improved Thermal Stability App 20090173015 - Keshavan; Madapusi K. ; et al.	2009-07-09
Polycrystalline Diamond Materials Having Improved Abrasion Resistance, Thermal Stability and Impact Resistance App 20090166094 - Keshavan; Madapusi K. ; et al.	2009-07-02
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same Grant 7,533,740 - Zhang , et al. May 19, 2	2009-05-19
Layered Hardfacing, Durable Hardfacing For Drill Bits App 20090120692 - Kembaiyan; Kumar T. ; et al.	2009-05-14
Ultra-hard Composite Constructions Comprising High-density Diamond Surface App 20090071727 - KESHAVAN; Madapusi K. ; et al.	2009-03-19
High Energy Cutting Elements And Bits Incorporating The Same App 20090057033 - Keshavan; Madapusi K.	2009-03-05
Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance Grant 7,493,973 - Keshavan , et al. February 24, 2	2009-02-24
Use Of Nanosized Particulates And Fibers In Elastomer Seals For Improved Performance Metrics For Roller Cone Bits App 20090038858 - Griffo; Anthony ; et al.	2009-02-12
Cutting element with canted interface surface and bit body incorporating the same App 20090025985 - Eyre; Ronald K. ; et al.	2009-01-29
Novel Cutting Structures App 20090022952 - Keshavan; Madapusi K.	2009-01-22
Method of manufacturing a cutting element from a partially densified substrate Grant 7,470,341 - Keshavan , et al. December 30, 2	2008-12-30
Polycrystalline Diamond Cutting Elements Having Improved Thermal Resistance App 20080302579 - KESHAVAN; Madapusi K. ; et al.	2008-12-11
Multiple diameter cutting elements and bits incorporating the same Grant 7,461,709 - Keshavan , et al. December 9, 2	2008-12-09
High energy cutting elements and bits incorporating the same Grant 7,451,838 - Keshavan November 18, 2	2008-11-18
Cutting structures Grant 7,435,478 - Keshavan October 14, 2	2008-10-14
Polycrystalline Diamond Having Improved Thermal Stability App 20080230280 - Keshavan; Madapusi K. ; et al.	2008-09-25
Polycrystalline Diamond Constructions Having Improved Thermal Stability App 20080223623 - Keshavan; Madapusi K. ; et al.	2008-09-18
Hybrid Carbon Nanotube Reinforced Composite Bodies App 20080210473 - Zhang; Youhe ; et al.	2008-09-04
Polycrystalline Composites Reinforced With Elongated Nanostructures App 20080209818 - Belnap; J. Daniel ; et al.	2008-09-04
Manufacture Of Thermally Stable Cutting Elements App 20080185189 - Griffo; Anthony ; et al.	2008-08-07
Thermally stable diamond cutting elements in roller cone drill bits Grant 7,407,012 - Keshavan , et al. August 5, 2	2008-08-05
Nano-reinforced Wc-co For Improved Properties App 20080179104 - Zhang; Youhe ; et al.	2008-07-31
Reinforcing overlay for matrix bit bodies App 20080164070 - Keshavan; Madapusi K. ; et al.	2008-07-10
Cutting element with canted interface surface and bit body incorporating the same Grant 7,395,885 - Eyre , et al. July 8, 2	2008-07-08
Thermally Stable Ultra-hard Material Compact Constructions App 20080142276 - GRIFFO; Anthony ; et al.	2008-06-19
Impregnated Diamond Cutting Structures App 20080128951 - Lockwood; Greg ; et al.	2008-06-05
Layered hardfacing, durable hardfacing for drill bits Grant 7,373,997 - Kembaiyan , et al. May 20, 2	2008-05-20
Impregnated diamond cutting structures Grant 7,350,599 - Lockwood , et al. April 1, 2	2008-04-01
Polycrystalline Diamond Composites App 20080073126 - SHEN; Yuelin ; et al.	2008-03-27
Atomic Layer Deposition Nanocoatings On Cutting Tool Powder Materials App 20080073127 - Zhan; Guodong ; et al.	2008-03-27
Rolling cutter App 20070278017 - Shen; Yuelin ; et al.	2007-12-06
High performance rock bit grease App 20070254817 - Griffo; Anthony ; et al.	2007-11-01
Microwave sintering App 20070151769 - Slutz; David ; et al.	2007-07-05
Ordered elastomeric composite material Grant 7,229,077 - Keshavan , et al. June 12, 2	2007-06-12
Cutting element with canted interface surface and bit body incorporating the same App 20070119631 - Eyre; Ronald K. ; et al.	2007-05-31
High energy cutting elements and bits incorporating the same App 20070029116 - Keshavan; Madapusi K.	2007-02-08
Thermally stable diamond cutting elements in roller cone drill bits App 20070023206 - Keshavan; Madapusi K. ; et al.	2007-02-01
Cutting element with canted interface surface and bit body incorporating the same Grant 7,165,636 - Eyre , et al. January 23, 2	2007-01-23
Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance App 20060266559 - Keshavan; Madapusi K. ; et al.	2006-11-30
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same App 20060207802 - Zhang; Youhe ; et al.	2006-09-21
Thermally stable polycrystalline diamond materials, cutting elements incorporating the same and bits incorporating such cutting elements App 20060191723 - Keshavan; Madapusi K.	2006-08-31
Layered hardfacing, durable hardfacing for drill bits App 20060185908 - Kembaiyan; Kumar T. ; et al.	2006-08-24
Novel cutting structures App 20060165993 - Keshavan; Madapusi K.	2006-07-27
Impregnated diamond cutting structures App 20060081402 - Lockwood; Greg ; et al.	2006-04-20
Coarse carbide substrate cutting elements and method of forming the same Grant 7,017,677 - Keshavan , et al. March 28, 2	2006-03-28
Method for forming cutting elements App 20060054363 - Eyre; Ronald K. ; et al.	2006-03-16
Cutting element Grant 6,991,049 - Eyre , et al. January 31, 2	2006-01-31
Cutting element having a substrate, a transition layer and an ultra hard material layer Grant 6,892,836 - Eyre , et al. May 17, 2	2005-05-17
Multiple diameter cutting elements and bits incorporating the same App 20050082093 - Keshavan, Madapusi K. ; et al.	2005-04-21
Ordered elastomeric composite material App 20040251052 - Keshavan, Madapusi K. ; et al.	2004-12-16
Method of manufacturing a cutting element from a partially densified substrate App 20040141865 - Keshavan, Madapusi K. ; et al.	2004-07-22
Coarse carbide substrate cutting elements and method of forming the same App 20040016557 - Keshavan, Madapusi K. ; et al.	2004-01-29
Method for forming cutting elements App 20030079918 - Eyre, Ronald K. ; et al.	2003-05-01
Engineered enhanced inserts for rock drilling bits Grant 6,484,826 - Anderson , et al. November 26, 2	2002-11-26
Engineered enhanced inserts for rock drilling bits Grant 6,460,637 - Siracki , et al. October 8, 2	2002-10-08
Drill bit inserts with variations in thickness of diamond coating Grant 6,460,636 - Yong , et al. October 8, 2	2002-10-08
Method for forming cutting elements App 20020079140 - Eyre, Ronald K. ; et al.	2002-06-27
Cubic boron nitride flat cutting element compacts App 20010054332 - Cheynet De Beaupre, Jerome J. ; et al.	2001-12-27
Cutting element with canted design for improved braze contact area Grant 6,202,772 - Eyre , et al. March 20, 2	2001-03-20
Engineered enhanced inserts for rock drilling bits Grant 6,199,645 - Anderson , et al. March 13, 2	2001-03-13
Method for forming a non-uniform interface adjacent ultra hard material Grant 6,193,001 - Eyre , et al. February 27, 2	2001-02-27
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
Manufacture of cutting tools Grant 5,868,885 - Crockett , et al. February 9, 1	1999-02-09
Surface enhanced polycrystalline diamond composite cutters Grant 5,833,021 - Mensa-Wilmot , et al. November 10, 1	1998-11-10
Method of making a polycrystalline cubic boron nitride cutting tool Grant 5,830,813 - Yao , et al. November 3, 1	1998-11-03
Multi-layer anvil for ultra high pressure presses Grant 5,780,139 - Carter , et al. July 14, 1	1998-07-14
Method for forming a polycrystalline layer of ultra hard material Grant 5,766,394 - Anderson , et al. June 16, 1	1998-06-16
Hard facing material for rock bits Grant 5,715,899 - Liang , et al. February 10, 1	1998-02-10
Polycrystallline cubic boron nitride cutting tool Grant 5,639,285 - Yao , et al. June 17, 1	1997-06-17
Composite cemented carbide Grant 5,593,474 - Keshavan , et al. January 14, 1	1997-01-14
High performance overlay for rock drilling bits Grant 5,535,838 - Keshavan , et al. July 16, 1	1996-07-16
Composite nozzles for rock bits Grant 5,494,122 - Larsen , et al. February 27, 1	1996-02-27
Rock bit Grant 5,485,890 - Cawthorne , et al. January 23, 1	1996-01-23
Rock bit with mechanical seal Grant 5,472,058 - Hooper , et al. December 5, 1	1995-12-05
O-ring seal for rock bit bearings Grant 5,456,327 - Denton , et al. October 10, 1	1995-10-10
O-ring seal for rock bit bearings Grant 5,402,858 - Quantz , et al. April 4, 1	1995-04-04
Carbide or boride coated rotor for a positive displacement motor or pump Grant 5,395,221 - Tucker, Jr. , et al. March 7, 1	1995-03-07
Drill bit inserts enhanced with polycrystalline diamond Grant 5,370,195 - Keshavan , et al. December 6, 1	1994-12-06
Rock bit with cobalt alloy cemented tungsten carbide inserts Grant 5,305,840 - Liang , et al. April 26, 1	1994-04-26
Hardfaced mill tooth rotary cone rock bit Grant 5,152,194 - Keshavan , et al. October 6, 1	1992-10-06
Hard facing Grant 5,051,112 - Keshavan , et al. September 24, 1	1991-09-24
Diamond-containing cemented metal carbide Grant 5,045,092 - Keshavan September 3, 1	1991-09-03
Diamond insert Grant 4,972,912 - Keshavan November 27, 1	1990-11-27
Hard facing for milled tooth rock bits Grant 4,944,774 - Keshavan , et al. July 31, 1	1990-07-31
Hard facing for milled tooth rock bits Grant 4,836,307 - Keshavan , et al. June 6, 1	1989-06-06
Abrasion resistant coating composition Grant 4,526,618 - Keshavan , et al. July 2, 1	1985-07-02

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