Inventor

GERHARDT GEOFF C

US34 patents

⚠️ This page may combine multiple inventors who share the name “GERHARDT GEOFF C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GERHARDT GEOFF C

WATERS TECHNOLOGIES CORP

Capillary interconnection fitting and method of holding capillary tubing

Closed loop flow control of a HPLC constant flow pump to enable low-flow operation

Systems, devices, and methods for connecting a chromatography system to a mass spectrometer

Managing fluidic connections to microfluidic devices

Freeze-thaw valve that self-limits cryogenic agent usage

Mass spectrometer ion source with integrated column

Micro solid phase extraction devices and methods

Method and apparatus for injecting a chromatographic sample

Pressure sensing and flow control in diffusion-bonded planar devices for fluid chromatography

Systems and methods of compensation for chromatography column volume variations

Closed loop flow control of a HPLC constant flow pump to enable low-flow operation

Insulated serial column chromatography arrangements and systems

Parallel insulated chromatography columns

Micro solid phase extraction devices and methods

WATERS INVESTMENTS LTD

Method for using a hydraulic amplifier pump in ultrahigh pressure liquid chromatography

Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography

Fluid flow control freeze/thaw valve for narrow bore capillaries or microfluidic devices

Flow sensing apparatus

Flow sensing apparatus used to monitor/provide feedback to a split flow pumping system

High pressure capillary micro-fluidic valve device and a method of fabricating same

System and method of measuring convection induced impedance gradients to determine liquid flow rates

System and method of measuring convection induced impedance gradients to determine liquid flow rates

GERHARDT GEOFF C

Variable-volume injection valve

Sample injector system for liquid chromatography

Closed loop flow control of a HPLC constant flow pump to enable low-flow operation

Electrokinetically controlled calibrant delivery

Thermal-based flow sensing apparatuses and methods for high-performance liquid chromatography

Variable resistance fluid controller

Flow sensors and flow sensing methods with extended linear range

Flow sensing apparatus used to monitor/provide feedback system to a split flow pumping system

BUNNER BERNARD

Interfacing with a digital microfluidic device

Pressure sensing and flow control in diffusion-bonded planar devices for fluid chromatography

CHARLTON CHRISTOPHER B

Compliant-seal check valve

MURPHY JAMES P

Analysis of dried blood spot samples in a microfluidic system with dilution of extracted samples