Inventor · disambiguated record
Nigel Dennis Griffin
Also filed as: GRIFFIN NIGEL D · GRIFFIN NIGEL DENNIS
44 granted patents·7 pending applications·6,088 citations·filing 1986–2010
99Inventor score
Files withCAMCO INT UK LTD14CAMCO DRILLING GROUP LTD10REEDHYCALOG UK LTD7GRIFFIN NIGEL D4REED TOOL CO3
Top patents by PatentIndex Score
51 records- 0199US6861137B2High volume density polycrystalline diamond with working surfaces depleted of catalyzing materialREEDHYCALOG UK LTD·Filed 2003·Granted Mar 1, 2005·329 cites·28 claims
- 0299US6592985B2Polycrystalline diamond partially depleted of catalyzing materialCAMCO INT UK LTD·Filed 2001·Granted Jul 15, 2003·299 cites·17 claims
- 0399US6589640B2Polycrystalline diamond partially depleted of catalyzing materialFiled 2002·Granted Jul 8, 2003·284 cites·43 claims
- 0499US6562462B2High volume density polycrystalline diamond with working surfaces depleted of catalyzing materialCAMCO INT UK LTD·Filed 2001·Granted May 13, 2003·309 cites·25 claims
- 0599US6544308B2High volume density polycrystalline diamond with working surfaces depleted of catalyzing materialCAMCO INT UK LTD·Filed 2001·Granted Apr 8, 2003·408 cites·7 claims
- 0698US6878447B2Polycrystalline diamond partially depleted of catalyzing materialREEDHYCALOG UK LTD·Filed 2003·Granted Apr 12, 2005·208 cites·17 claims
- 0798US6861098B2Polycrystalline diamond partially depleted of catalyzing materialREEDHYCALOG UK LTD·Filed 2003·Granted Mar 1, 2005·197 cites·17 claims
- 0898US6797326B2Method of making polycrystalline diamond with working surfaces depleted of catalyzing materialREEDHYCALOG UK LTD·Filed 2002·Granted Sep 28, 2004·208 cites·7 claims
- 0998US6739214B2Polycrystalline diamond partially depleted of catalyzing materialREEDHYCALOG UK LTD·Filed 2002·Granted May 25, 2004·213 cites·5 claims
- 1098US6601662B2Polycrystalline diamond cutters with working surfaces having varied wear resistance while maintaining impact strengthGRANT PRIDECO LP·Filed 2001·Granted Aug 5, 2003·412 cites·50 claims
- 1198US6585064B2Polycrystalline diamond partially depleted of catalyzing materialFiled 2002·Granted Jul 1, 2003·249 cites·40 claims
- 1298US6248447B1Cutting elements and methods of manufacture thereofCAMCO INT UK LTD·Filed 1999·Granted Jun 19, 2001·216 cites·19 claims
- 1397US7568534B2Dual-edge working surfaces for polycrystalline diamond cutting elementsREEDHYCALOG UK LTD·Filed 2008·Granted Aug 4, 2009·79 cites·1 claims
- 1497US6749033B2Polycrystalline diamond partially depleted of catalyzing materialREEDHYOALOG UK LTD·Filed 2002·Granted Jun 15, 2004·253 cites·36 claims
- 1597US6435058B1Rotary drill bit design methodCAMCO INT UK LTD·Filed 2001·Granted Aug 20, 2002·181 cites·11 claims
- 1697US6410085B1Method of machining of polycrystalline diamondCAMCO INT UK LTD·Filed 2001·Granted Jun 25, 2002·158 cites·9 claims
- 1797US4956238AManufacture of cutting structures for rotary drill bitsREED TOOL CO·Filed 1988·Granted Sep 11, 1990·92 cites·3 claims
- 1896US6517902B2Methods of treating preform elementsCAMCO INT UK LTD·Filed 2001·Granted Feb 11, 2003·180 cites·10 claims
- 1996US6481511B2Rotary drill bitCAMCO INTERNAT U K LTD·Filed 2001·Granted Nov 19, 2002·143 cites·14 claims
- 2095US5469927ACutting elements for rotary drill bitsCAMCO INT·Filed 1993·Granted Nov 28, 1995·186 cites·12 claims
- 2194US6142250ARotary drill bit having moveable formation-engaging membersCAMCO INT UK LTD·Filed 1998·Granted Nov 7, 2000·207 cites·36 claims
- 2294US6056911AMethods of treating preform elements including polycrystalline diamond bonded to a substrateCAMCO INT UK LTD·Filed 1998·Granted May 2, 2000·140 cites·17 claims
- 2394US5111895ACutting elements for rotary drill bitsGRIFFIN NIGEL D·Filed 1990·Granted May 12, 1992·63 cites·15 claims
- 2492US6065554APreform cutting elements for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1997·Granted May 23, 2000·177 cites·39 claims
- 2591US4669522AManufacture of rotary drill bitsNL PETROLEUM PROD·Filed 1986·Granted Jun 2, 1987·66 cites·15 claims
- 2690US6269894B1Cutting elements for rotary drill bitsCAMCO INT UK LTD·Filed 1999·Granted Aug 7, 2001·128 cites·13 claims
- 2789US5669271AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1995·Granted Sep 23, 1997·67 cites·7 claims
- 2880US5590728AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jan 7, 1997·68 cites·37 claims
- 2978US6145607APreform cutting elements for rotary drag-type drill bitsCAMCO INT UK LTD·Filed 1998·Granted Nov 14, 2000·74 cites·27 claims
- 3078US5617928AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1995·Granted Apr 8, 1997·61 cites·14 claims
- 3177US8910730B2Cutting elementGRIFFIN NIGEL D·Filed 2010·Granted Dec 16, 2014·6 cites·23 claims
- 3275US6962214B2Rotary seal for directional drilling toolsSCHLUMBERGER WCP LTD·Filed 2001·Granted Nov 8, 2005·48 cites·17 claims
- 3374US5487436ACutter assemblies for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jan 30, 1996·30 cites·11 claims
- 3473US6439327B1Cutting elements for rotary drill bitsCAMCO INT UK LTD·Filed 2000·Granted Aug 27, 2002·40 cites·23 claims
- 3572US4949598AManufacture of rotary drill bitsREED TOOL CO·Filed 1988·Granted Aug 21, 1990·25 cites·23 claims
- 3670US5598750AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1994·Granted Feb 4, 1997·35 cites·15 claims
- 3769US6131678APreform elements and mountings thereforCAMCO INT UK LTD·Filed 1998·Granted Oct 17, 2000·54 cites·11 claims
- 3869US5622233AElements faced with superhard materialsCAMCO DRILLING GROUP LTD·Filed 1995·Granted Apr 22, 1997·42 cites·5 claims
- 3969US5348109ACutter assemblies and cutting elements for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1993·Granted Sep 20, 1994·44 cites·25 claims
- 4056US5888619AElements faced with superhard materialCAMCO DRILLING GROUP LTD·Filed 1996·Granted Mar 30, 1999·16 cites·32 claims
- 4155US6077591AElements faced with superhard materialCAMCO INT UK LTD·Filed 1998·Granted Jun 20, 2000·32 cites·17 claims
- 4255US5060739ACutter assemblies for rotary drill bits, and method of manufacturing sameGRIFFIN NIGEL D·Filed 1990·Granted Oct 29, 1991·28 cites·15 claims
- 4353US4947945ARelating to cutter assemblies for rotary drill bitsREED TOOL CO·Filed 1989·Granted Aug 14, 1990·13 cites·19 claims
- 4449US5421425ACutting elements for rotary drill bitsCAMCO DRILLING GROUP LTD·Filed 1994·Granted Jun 6, 1995·20 cites·16 claims
- 4544US2005115744A1High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing MaterialFiled 2005·Application pending·0 cites
- 4644US2008142267A1Multi-Edge Working Surfaces for Polycrystalline Diamond Cutting ElementsREEDHYCALOG UK LTD·Filed 2008·Application pending·0 cites
- 4744US2005129950A1Polycrystalline Diamond Partially Depleted of Catalyzing MaterialFiled 2005·Application pending·0 cites
- 4841US2006086540A1Dual-Edge Working Surfaces for Polycrystalline Diamond Cutting ElementsGRIFFIN NIGEL D·Filed 2005·Application pending·0 cites
- 4937US2004007394A1Cutter and method of manufacture thereofFiled 2002·Application pending·0 cites
- 5037US2004007393A1Cutter and method of manufacture thereofFiled 2002·Application pending·0 cites
Showing the top 50 of 51 patent records by PatentIndex Score.
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