Inventor · disambiguated record
Robert W. Evans
Also filed as: EVANS JR ROBERT W · EVANS ROBERT · EVANS ROBERT E · EVANS ROBERT W
75 granted patents·11 pending applications·1,966 citations·filing 1974–2025
99Inventor score
Files withEVANS ROBERT W33HUGHES TOOL CO5BAKER INT CORP4EVANS ENGINEERING & MFG INC4TIMESAVER DOWNHOLE PRODUCTS LLC4
Top patents by PatentIndex Score
86 records- 0197US8366082B2Belleville spring guide systemHALLIBURTON ENERGY SERV INC·Filed 2010·Granted Feb 5, 2013·22 cites·6 claims
- 0295US10151165B2Adjustable hydraulic jarring deviceEVANS ROBERT W·Filed 2016·Granted Dec 11, 2018·7 cites·4 claims
- 0395US7854425B2Belleville spring guide systemHALLIBURTON ENERGY SERV INC·Filed 2005·Granted Dec 21, 2010·26 cites·16 claims
- 0494US11702898B2Adjustable hydraulic jarring deviceEVANS ROBERT W·Filed 2021·Granted Jul 18, 2023·2 cites·6 claims
- 0594US8205690B2Dual acting locking jarEVANS ROBERT W·Filed 2010·Granted Jun 26, 2012·22 cites·12 claims
- 0693US12252947B2Adjustable hydraulic jarring deviceEVANS ROBERT W·Filed 2023·Granted Mar 18, 2025·1 cites·4 claims
- 0793US10408009B2Release lugs for a jarring deviceEVANS ROBERT W·Filed 2018·Granted Sep 10, 2019·5 cites·10 claims
- 0893US4985206ATissue processing apparatusSHANDON SCIENT LTD·Filed 1988·Granted Jan 15, 1991·206 cites·4 claims
- 0992US4293038ABall valve assemblyBAKER INT CORP·Filed 1979·Granted Oct 6, 1981·80 cites·15 claims
- 1091US8561688B2Compact jar for dislodging tools in an oil or gas wellEVANS ROBERT W·Filed 2012·Granted Oct 22, 2013·12 cites·19 claims
- 1190US4587970ATachycardia reversion pacerTELECTRONICS NV·Filed 1985·Granted May 13, 1986·267 cites·122 claims
- 1289US11105170B2Adjustable hydraulic jarring deviceEVANS ROBERT W·Filed 2018·Granted Aug 31, 2021·3 cites·6 claims
- 1389US7510008B2Method and apparatus for decreasing drag force of trigger mechanismEVANS ROBERT W·Filed 2007·Granted Mar 31, 2009·35 cites·12 claims
- 1488US10975649B2Predetermined load release device for a jarEVANS ENGINEERING & MFG INC·Filed 2019·Granted Apr 13, 2021·3 cites·8 claims
- 1587US10208554B2Predetermined load release device for a jarEVANS ENGINEERING & MFG INC·Filed 2015·Granted Feb 19, 2019·4 cites·9 claims
- 1687US8380056B2Inter-axial inline fluid heaterINFINITY FLUIDS CORP·Filed 2008·Granted Feb 19, 2013·18 cites·11 claims
- 1786US11473385B2Release lugs for a jarring deviceEVANS ROBERT W·Filed 2021·Granted Oct 18, 2022·1 cites·3 claims
- 1886US10669800B2Release lugs for a jarring deviceEVANS ENGINEERING & MFG INC·Filed 2018·Granted Jun 2, 2020·3 cites·14 claims
- 1986US9095368B2Follicular unit extraction deviceUMAR SANUSI·Filed 2012·Granted Aug 4, 2015·31 cites·10 claims
- 2086US6481495B1Downhole tool with electrical conductorFiled 2000·Granted Nov 19, 2002·75 cites·41 claims
- 2185US5318139AReduced waiting time hydraulic drilling jarEVANS ROBERT W·Filed 1993·Granted Jun 7, 1994·45 cites·11 claims
- 2284US9835355B2Inter-axial inline fluid heaterEVANS ROBERT·Filed 2012·Granted Dec 5, 2017·5 cites·19 claims
- 2384US6507832B1Using ink temperature gain to identify causes of web breaks in a printing systemDONNELLEY & SONS CO·Filed 1999·Granted Jan 14, 2003·99 cites·30 claims
- 2484US6290004B1Hydraulic jarFiled 1999·Granted Sep 18, 2001·98 cites·20 claims
- 2583US9428980B2Hydraulic/mechanical tight hole jarEVANS ROBERT W·Filed 2010·Granted Aug 30, 2016·8 cites·21 claims
- 2683US7350536B2Vacuumized receptacle for sample collectionEVANS COMPONENTS INC·Filed 2005·Granted Apr 1, 2008·11 cites·19 claims
- 2782US4361195ADouble acting hydraulic mechanismEVANS ROBERT W·Filed 1980·Granted Nov 30, 1982·58 cites·35 claims
- 2882US4000074ACentrifuge having an inner, invertible, funnel-like containerUS ARMY·Filed 1974·Granted Dec 28, 1976·36 cites·10 claims
- 2982US2025215760A1Adjustable Hydraulic Jarring DeviceEVANS ROBERT W·Filed 2025·Application pending·0 cites
- 3081US12281532B2Predetermined load release device for a jarEVANS ROBERT W·Filed 2023·Granted Apr 22, 2025·0 cites·4 claims
- 3181US12139988B2Release lugs for a jarring deviceEVANS ROBERT W·Filed 2023·Granted Nov 12, 2024·0 cites·5 claims
- 3279US5511718AProcess for making monolayer superabrasive toolsABRASIVE TECH INC·Filed 1994·Granted Apr 30, 1996·50 cites·3 claims
- 3378US5086853ALarge bore hydraulic drilling jarDAILEY PETROLEUM SERVICES·Filed 1991·Granted Feb 11, 1992·68 cites·9 claims
- 3477US11821278B2Release lugs for a jarring deviceEVANS ROBERT W·Filed 2022·Granted Nov 21, 2023·0 cites·15 claims
- 3577US11802458B2Predetermined load release device for a jarEVANS ROBERT W·Filed 2022·Granted Oct 31, 2023·0 cites·11 claims
- 3677US8256509B2Compact jar for dislodging tools in an oil or gas wellEVANS ROBERT W·Filed 2009·Granted Sep 4, 2012·13 cites·7 claims
- 3777US4604964ATissue processing apparatusSHANDON SOUTHERN PROD·Filed 1985·Granted Aug 12, 1986·47 cites·18 claims
- 3877US4566546ASingle acting hydraulic fishing jarEVANS ROBERT W·Filed 1984·Granted Jan 28, 1986·46 cites·20 claims
- 3976US11591876B1Time-controlled cable-head cutter for line conveyed toolsTIMESAVER DOWNHOLE PRODUCTS LLC·Filed 2021·Granted Feb 28, 2023·1 cites·12 claims
- 4076US9328567B2Double-acting shock damper for a downhole assemblyEVANS ROBERT W·Filed 2012·Granted May 3, 2016·5 cites·18 claims
- 4176US8840488B2Golf putterEVANS ROBERT·Filed 2011·Granted Sep 23, 2014·9 cites·5 claims
- 4275US6988551B2Jar with adjustable trigger loadEVANS ROBERT W·Filed 2003·Granted Jan 24, 2006·45 cites·12 claims
- 4374US9255456B2Method and apparatus for improving the efficiency of a positive displacement motor for drilling and oil or gas wellEVANS ROBERT W·Filed 2013·Granted Feb 9, 2016·4 cites·9 claims
- 4474US8424361B1Pittsburgh lock opening toolEVANS ROBERT·Filed 2012·Granted Apr 23, 2013·5 cites·16 claims
- 4574US5232060ADouble-acting accelerator for use with hydraulic drilling jarsEVANS ROBERT W·Filed 1991·Granted Aug 3, 1993·57 cites·15 claims
- 4673US10202815B2Release lugs for a jarring deviceEVANS ROBERT W·Filed 2015·Granted Feb 12, 2019·2 cites·4 claims
- 4771US11959350B2Release lugs for a jarring deviceEVANS ROBERT W·Filed 2022·Granted Apr 16, 2024·0 cites·15 claims
- 4871US5624001AMechanical-hydraulic double-acting drilling jarDAILEY PETROLEUM SERVICES·Filed 1995·Granted Apr 29, 1997·58 cites·12 claims
- 4971US4332267ABall valve assemblyBAKER INT CORP·Filed 1980·Granted Jun 1, 1982·36 cites·2 claims
- 5070US11536106B2Predetermined load release device for a jarEVANS ENGINEERING & MFG INC·Filed 2021·Granted Dec 27, 2022·0 cites·7 claims
Showing the top 50 of 86 patent records by PatentIndex Score.
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