Inventor · disambiguated record
Anton F. Zahradnik
Also filed as: ZAHRADNIK ANTON · ZAHRADNIK ANTON F
44 granted patents·12 pending applications·1,039 citations·filing 1982–2021
98Inventor score
Files withBAKER HUGHES INC43ZAHRADNIK ANTON F4HUGHES TOOL CO3BAKER HUGHES HOLDINGS LLC1BAKER HUGHES OILFIELD OPERATIONS LLC1
Top patents by PatentIndex Score
56 records- 0197US7861805B2Conformal bearing for rock drill bitBAKER HUGHES INC·Filed 2008·Granted Jan 4, 2011·35 cites·17 claims
- 0295US7900717B2Expandable reamers for earth boring applicationsBAKER HUGHES INC·Filed 2007·Granted Mar 8, 2011·83 cites·33 claims
- 0395US4727942ACompensator for earth boring bitsHUGHES TOOL CO·Filed 1986·Granted Mar 1, 1988·149 cites·12 claims
- 0494US7387177B2Bearing insert sleeve for roller cone bitBAKER HUGHES INC·Filed 2006·Granted Jun 17, 2008·73 cites·19 claims
- 0593US8356398B2Modular hybrid drill bitBAKER HUGHES INC·Filed 2011·Granted Jan 22, 2013·26 cites·14 claims
- 0692US6026917AEarth-boring bit with improved bearing sealBAKER HUGHES INC·Filed 1997·Granted Feb 22, 2000·58 cites·20 claims
- 0791US7392862B2Seal insert ring for roller cone bitsBAKER HUGHES INC·Filed 2006·Granted Jul 1, 2008·56 cites·17 claims
- 0891US6651756B1Steel body drill bits with tailored hardfacing structural elementsBAKER HUGHES INC·Filed 2000·Granted Nov 25, 2003·135 cites·22 claims
- 0990US8453763B2Expandable earth-boring wellbore reamers and related methodsRADFORD STEVEN R·Filed 2011·Granted Jun 4, 2013·13 cites·19 claims
- 1090US7845435B2Hybrid drill bit and method of drillingBAKER HUGHES INC·Filed 2008·Granted Dec 7, 2010·46 cites·34 claims
- 1188US9353575B2Hybrid drill bits having increased drilling efficiencyBAKER HUGHES INC·Filed 2012·Granted May 31, 2016·9 cites·22 claims
- 1287US8925654B2Earth-boring tools and methods of forming earth-boring toolsZAHRADNIK ANTON F·Filed 2011·Granted Jan 6, 2015·9 cites·15 claims
- 1385US9187960B2Expandable reamer toolsBAKER HUGHES INC·Filed 2013·Granted Nov 17, 2015·8 cites·22 claims
- 1484US4428687AFloating seal for earth boring bitHUGHES TOOL CO·Filed 1983·Granted Jan 31, 1984·61 cites·6 claims
- 1583US10190366B2Hybrid drill bits having increased drilling efficiencyBAKER HUGHES INC·Filed 2016·Granted Jan 29, 2019·3 cites·20 claims
- 1681US8678111B2Hybrid drill bit and design methodZAHRADNIK ANTON F·Filed 2008·Granted Mar 25, 2014·18 cites·46 claims
- 1780US9249629B2Enhanced backup ring edge features for metal face seal in roller cone drill bitsBAKER HUGHES INC·Filed 2015·Granted Feb 2, 2016·2 cites·10 claims
- 1879US7472764B2Rotary drill bit shank, rotary drill bits so equipped, and methods of manufactureBAKER HUGHES INC·Filed 2005·Granted Jan 6, 2009·15 cites·29 claims
- 1978US10072462B2Hybrid drill bitsBAKER HUGHES INC·Filed 2016·Granted Sep 11, 2018·2 cites·18 claims
- 2077US7861806B2Shank structure for rotary drill bitsBAKER HUGHES INC·Filed 2009·Granted Jan 4, 2011·3 cites·12 claims
- 2176US7594454B2Methods of fabricating rotary drill bitsBAKER HUGHES INC·Filed 2007·Granted Sep 29, 2009·3 cites·15 claims
- 2273US8141664B2Hybrid drill bit with high bearing pin anglesZAHRADNIK ANTON F·Filed 2009·Granted Mar 27, 2012·13 cites·15 claims
- 2373US6374704B1Steel-tooth bit with improved toughnessBAKER HUGHES INC·Filed 1996·Granted Apr 23, 2002·24 cites·13 claims
- 2472US7997354B2Expandable reamers for earth-boring applications and methods of using the sameBAKER HUGHES INC·Filed 2007·Granted Aug 16, 2011·11 cites·16 claims
- 2570US9670736B2Hybrid drill bitBAKER HUGHES INC·Filed 2013·Granted Jun 6, 2017·3 cites·22 claims
- 2670US8028770B2Conformal bearing for rock drill bitBAKER HUGHES INC·Filed 2010·Granted Oct 4, 2011·3 cites·20 claims
- 2766US8978786B2System and method for adjusting roller cone profile on hybrid bitNGUYEN DON Q·Filed 2010·Granted Mar 17, 2015·4 cites·18 claims
- 2866US8459378B2Hybrid drill bitZAHRADNIK ANTON F·Filed 2009·Granted Jun 11, 2013·8 cites·27 claims
- 2964US9157280B2Enhanced backup ring features for metal face seal in roller cone drill bitsBAKER HUGHES INC·Filed 2013·Granted Oct 13, 2015·2 cites·23 claims
- 3064US7841426B2Hybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bitBAKER HUGHES INC·Filed 2007·Granted Nov 30, 2010·9 cites·28 claims
- 3164US7708090B2Excluder ring for earth-boring bitBAKER HUGHES INC·Filed 2006·Granted May 4, 2010·8 cites·7 claims
- 3262US10871036B2Hybrid drill bit and design methodBAKER HUGHES HOLDINGS LLC·Filed 2019·Granted Dec 22, 2020·0 cites·16 claims
- 3361US10316589B2Hybrid drill bit and design methodBAKER HUGHES INC·Filed 2014·Granted Jun 11, 2019·1 cites·23 claims
- 3461US5351769AEarth-boring bit having an improved hard-faced tooth structureBAKER HUGHES INC·Filed 1993·Granted Oct 4, 1994·34 cites·10 claims
- 3561US5295549AMechanical lock to prevent seal ring rotationBAKER HUGHES INC·Filed 1992·Granted Mar 22, 1994·42 cites·8 claims
- 3659US6142249AEarth-boring bit with improved bearing sealBAKER HUGHES INC·Filed 1999·Granted Nov 7, 2000·32 cites·19 claims
- 3759US5351771AEarth-boring bit having an improved hard-faced tooth structureBAKER HUGHES INC·Filed 1993·Granted Oct 4, 1994·31 cites·11 claims
- 3858US9316055B2Drill bit with a dynamic metal sealLIN CHIH·Filed 2013·Granted Apr 19, 2016·1 cites·16 claims
- 3957US11732531B2Modular earth boring tools having fixed blades and removable blade assemblies and related methodsBAKER HUGHES OILFIELD OPERATIONS LLC·Filed 2021·Granted Aug 22, 2023·0 cites·20 claims
- 4053US9810026B2Earth-boring tools and methods of forming earth-boring toolsBAKER HUGHES INC·Filed 2015·Granted Nov 7, 2017·0 cites·18 claims
- 4152US7600589B2Rotary drill bitsBAKER HUGHES INC·Filed 2007·Granted Oct 13, 2009·2 cites·20 claims
- 4249US2014225328A1Enhanced Backup Ring Edge Features for Metal Face Seal in Roller Cone Drill BitsBAKER HUGHES INC·Filed 2013·Application pending·0 cites
- 4347US7741561B2Electrosmog shielding for cable conduitZAHRADNIK ANTON·Filed 2008·Granted Jun 22, 2010·2 cites·5 claims
- 4447US2011203849A1Expandable Reamers for Earth Boring ApplicationsBAKER HUGHES INC·Filed 2011·Application pending·0 cites
- 4547US2009014217A1Roller Cone Bit Bearing, and Bearing MaterialsBAKER HUGHES INC·Filed 2008·Application pending·0 cites
- 4643US7975779B2Threaded cone retention system for roller cone bitsBAKER HUGHES INC·Filed 2008·Granted Jul 12, 2011·0 cites·21 claims
- 4742US2009321146A1Earth Boring Bit with DLC Coated Bearing and SealBAKER HUGHES INC·Filed 2009·Application pending·0 cites
- 4842US2011024199A1Seal Ring With Auxiliary Ring for Earth-Boring BitBAKER HUGHES INC·Filed 2009·Application pending·0 cites
- 4942US2010155146A1Hybrid drill bit with high pilot-to-journal diameter ratioBAKER HUGHES INC·Filed 2009·Application pending·0 cites
- 5041US2009205873A1Downhole tool bearing system containing diamond enhanced materialsBAKER HUGHES INC·Filed 2009·Application pending·0 cites
Showing the top 50 of 56 patent records by PatentIndex Score.
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