Inventor · disambiguated record
Geoff C. Gerhardt
Also filed as: GERHARDT GEOFF · GERHARDT GEOFF C · GERHARDT GEOFF CHARLES
40 granted patents·13 pending applications·345 citations·filing 1999–2025
97Inventor score
Files withWATERS TECHNOLOGIES CORP25WATERS INVESTMENTS LTD12GERHARDT GEOFF C9BUNNER BERNARD2CA FOOD INSPECTION AGENCY1
Top patents by PatentIndex Score
53 records- 0195US6557575B1Fluid flow control freeze/thaw valve for narrow bore capillaries or microfluidic devicesWATERS INVESTMENTS LTD·Filed 2001·Granted May 6, 2003·63 cites·16 claims
- 0293US7311502B2Method for using a hydraulic amplifier pump in ultrahigh pressure liquid chromatographyWATERS INVESTMENTS LTD·Filed 2004·Granted Dec 25, 2007·47 cites·23 claims
- 0392US7909367B2Capillary interconnection fitting and method of holding capillary tubingWATERS TECHNOLOGIES CORP·Filed 2005·Granted Mar 22, 2011·24 cites·6 claims
- 0492US7674375B2Closed loop flow control of a HPLC constant flow pump to enable low-flow operationWATERS TECHNOLOGIES CORP·Filed 2005·Granted Mar 9, 2010·15 cites·8 claims
- 0592US6712587B2Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatographyWATERS INVESTMENTS LTD·Filed 2001·Granted Mar 30, 2004·45 cites·23 claims
- 0690US9115815B2Variable-volume injection valveGERHARDT GEOFF C·Filed 2011·Granted Aug 25, 2015·10 cites·18 claims
- 0786US9768004B2Systems, devices, and methods for connecting a chromatography system to a mass spectrometerWATERS TECHNOLOGIES CORP·Filed 2014·Granted Sep 19, 2017·6 cites·34 claims
- 0884US7186336B2Flow sensing apparatusWATERS INVESTMENTS LTD·Filed 2004·Granted Mar 6, 2007·25 cites·14 claims
- 0983US8679333B2Closed loop flow control of a HPLC constant flow pump to enable low-flow operationGERHARDT GEOFF C·Filed 2010·Granted Mar 25, 2014·4 cites·4 claims
- 1082US11105778B2Method and apparatus for injecting a chromatographic sampleWATERS TECHNOLOGIES CORP·Filed 2017·Granted Aug 31, 2021·2 cites·10 claims
- 1182US10866218B2Managing fluidic connections to microfluidic devicesWATERS TECHNOLOGIES CORP·Filed 2019·Granted Dec 15, 2020·1 cites·20 claims
- 1281US9719971B2Microfluidic flame ionization detectorWATERS TECHNOLOGIES CORP·Filed 2014·Granted Aug 1, 2017·3 cites·20 claims
- 1381US8943887B2Thermal-based flow sensing apparatuses and methods for high-performance liquid chromatographyGERHARDT GEOFF C·Filed 2010·Granted Feb 3, 2015·3 cites·16 claims
- 1481US8173070B2Sample injector system for liquid chromatographyGERHARDT GEOFF C·Filed 2005·Granted May 8, 2012·8 cites·54 claims
- 1578US12247962B2Micro solid phase extraction devices and methodsWATERS TECHNOLOGIES CORP·Filed 2019·Granted Mar 11, 2025·1 cites·20 claims
- 1677US7059185B2System and method of measuring convection induced impedance gradients to determine liquid flow ratesWATERS INVESTMENTS LTD·Filed 2005·Granted Jun 13, 2006·4 cites·18 claims
- 1777US2025327779A1Insulated serial column chromatography arrangements and systemsWATERS TECHNOLOGIES CORP·Filed 2025·Application pending·0 cites
- 1875US9304115B2Pressure sensing and flow control in diffusion-bonded planar devices for fluid chromatographyBUNNER BERNARD·Filed 2011·Granted Apr 5, 2016·3 cites·24 claims
- 1973US6413398B1Method for electrochemical detectionCA FOOD INSPECTION AGENCY·Filed 1999·Granted Jul 2, 2002·49 cites·32 claims
- 2072US9496125B2Interfacing with a digital microfluidic deviceBUNNER BERNARD·Filed 2009·Granted Nov 15, 2016·3 cites·13 claims
- 2172US9396916B2Electrokinetically controlled calibrant deliveryGERHARDT GEOFF C·Filed 2012·Granted Jul 19, 2016·2 cites·16 claims
- 2272US7332087B2Flow sensing apparatus used to monitor/provide feedback to a split flow pumping systemWATERS INVESTMENTS LTD·Filed 2003·Granted Feb 19, 2008·8 cites·5 claims
- 2370US12320787B2Insulated serial column chromatography arrangements and systemsWATERS TECHNOLOGIES CORP·Filed 2021·Granted Jun 3, 2025·0 cites·13 claims
- 2467US11733216B2Matching thermally modulated variable restrictors to chromatography separation columnsWATERS TECHNOLOGIES CORP·Filed 2020·Granted Aug 22, 2023·0 cites·11 claims
- 2567US7841190B2Freeze-thaw valve that self-limits cryogenic agent usageWATERS TECHNOLOGIES CORP·Filed 2005·Granted Nov 30, 2010·3 cites·4 claims
- 2663US9393504B2Closed loop flow control of a HPLC constant flow pump to enable low-flow operationWATERS TECHNOLOGIES CORP·Filed 2014·Granted Jul 19, 2016·0 cites·4 claims
- 2763US8671975B2Compliant-seal check valveCHARLTON CHRISTOPHER B·Filed 2007·Granted Mar 18, 2014·6 cites·16 claims
- 2862US12163934B2Parallel insulated chromatography columnsWATERS TECHNOLOGIES CORP·Filed 2021·Granted Dec 10, 2024·0 cites·15 claims
- 2960US11061003B2Method and apparatus for injecting a chromatographic sampleWATERS TECHNOLOGIES CORP·Filed 2019·Granted Jul 13, 2021·0 cites·13 claims
- 3058US2016018367A1Matching thermally modulated variable restrictors to chromatography separation columnsWATERS TECHNOLOGIES CORP·Filed 2014·Application pending·0 cites
- 3157US9952186B2Pressure sensing and flow control in diffusion-bonded planar devices for fluid chromatographyWATERS TECHNOLOGIES CORP·Filed 2016·Granted Apr 24, 2018·0 cites·13 claims
- 3257US2018161770A1Integral sample identification throughout a workflow processWATERS TECHNOLOGIES CORP·Filed 2018·Application pending·0 cites
- 3356US9829470B2Systems and methods of compensation for chromatography column volume variationsWATERS TECHNOLOGIES CORP·Filed 2014·Granted Nov 28, 2017·0 cites·17 claims
- 3456US8679332B2Flow sensing apparatus used to monitor/provide feedback system to a split flow pumping systemGERHARDT GEOFF C·Filed 2007·Granted Mar 25, 2014·0 cites·13 claims
- 3555US10024826B2Analysis of dried blood spot samples in a microfluidic system with dilution of extracted samplesMURPHY JAMES P·Filed 2012·Granted Jul 17, 2018·0 cites·24 claims
- 3655US8640730B2Variable resistance fluid controllerGERHARDT GEOFF C·Filed 2006·Granted Feb 4, 2014·3 cites·21 claims
- 3754US11169125B2Mass spectrometer ion source with integrated columnWATERS TECHNOLOGIES CORP·Filed 2019·Granted Nov 9, 2021·0 cites·18 claims
- 3854US2013068043A1Apparatus and methods for preparation and analysis of dried samples of a biological fluidJUNG MOON CHUL·Filed 2011·Application pending·0 cites
- 3953US12259369B2Micro solid phase extraction devices and methodsWATERS TECHNOLOGIES CORP·Filed 2019·Granted Mar 25, 2025·0 cites·20 claims
- 4053US10071374B2Apparatus and methods for creating a static and traversing thermal gradient on a microfluidic deviceWATERS TECHNOLOGIES CORP·Filed 2014·Granted Sep 11, 2018·0 cites·16 claims
- 4152US10852279B2Method and apparatus for flame ionization detection for chromatographyWATERS TECHNOLOGIES CORP·Filed 2017·Granted Dec 1, 2020·0 cites·20 claims
- 4252US9429548B2Flow sensors and flow sensing methods with extended linear rangeGERHARDT GEOFF C·Filed 2010·Granted Aug 30, 2016·0 cites·16 claims
- 4352US7204264B2High pressure capillary micro-fluidic valve device and a method of fabricating sameWATERS INVESTMENTS LTD·Filed 2004·Granted Apr 17, 2007·7 cites·29 claims
- 4452US2011272855A1Techniques For Patterning Valve ComponentsWATERS TECHNOLOGIES CORP·Filed 2009·Application pending·0 cites
- 4552US2007068872A1Nano-flow liquid chromatographic apparatus having robust capillary tubingWATERS INVESTMENTS LTD·Filed 2006·Application pending·0 cites
- 4651US2014345372A1Managing fluidic connections to microfluidic devicesWATER TECHNOLOGIES CORP·Filed 2013·Application pending·0 cites
- 4750US6962077B2System and method of measuring convection induced impedance gradients to determine liquid flow ratesWATERS INVESTMENTS LTD·Filed 2002·Granted Nov 8, 2005·0 cites·20 claims
- 4850US2015285714A1Integral sample identification throughout a workflow processWATERS TECHNOLOGIES CORP·Filed 2015·Application pending·0 cites
- 4948US2019111376A1Matching of restrictors and separation columnsWATERS TECHNOLOGIES CORP·Filed 2018·Application pending·0 cites
- 5046US2009321356A1Ceramic-based chromatography apparatus and methods for making sameWATERS INVESTMENTS LTD·Filed 2007·Application pending·0 cites
Showing the top 50 of 53 patent records by PatentIndex Score.
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