Inventor
Geoff C. Gerhardt
Inventor
Millbury, MA, US
Overview
Patents· 34 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Nprimary
G01NInvestigating or analysing materials by determining their chemical or physical properties27%
B01LChemical or physical laboratory apparatus for general use10%
G01FMeasuring volume, volume flow, mass flow or liquid level10%
Y10TTechnical subjects covered by former us classification10%
B01DSeparation7%
F04BPositive-displacement machines for liquids6%
F16KValves6%
G05DSystems for controlling or regulating non-electric variables6%
B05BSpraying apparatus3%
F16LPipes3%
PatentTitleYear
11,105,778Method and apparatus for injecting a chromatographic sample202111,061,003Method and apparatus for injecting a chromatographic sample202110,866,218Managing fluidic connections to microfluidic devices202010,852,279Method and apparatus for flame ionization detection for chromatography202010,071,374Apparatus and methods for creating a static and traversing thermal gradient on a microfluidic device201810,024,826Analysis of dried blood spot samples in a microfluidic system with dilution of extracted samples20189,952,186Pressure sensing and flow control in diffusion-bonded planar devices for fluid chromatography20189,829,470Systems and methods of compensation for chromatography column volume variations20179,768,004'Systems, devices, and methods for connecting a chromatography system to a mass spectrometer'20179,719,971'Microfluidic flame ionization detector'20179,496,125'Interfacing with a digital microfluidic device'20169,429,548'Flow sensors and flow sensing methods with extended linear range'20169,396,916'Electrokinetically controlled calibrant delivery'20169,393,504'Closed loop flow control of a HPLC constant flow pump to enable low-flow operation'20169,304,115'Pressure sensing and flow control in diffusion-bonded planar devices for fluid chromatography'20169,115,815'Variable-volume injection valve'20158,943,887'Thermal-based flow sensing apparatuses and methods for high-performance liquid chromatography'20158,679,332'Flow sensing apparatus used to monitor/provide feedback system to a split flow pumping system'20148,679,333'Closed loop flow control of a HPLC constant flow pump to enable low-flow operation'20148,671,975'Compliant-seal check valve'20148,640,730'Variable resistance fluid controller'20148,173,070'Sample injector system for liquid chromatography'20127,909,367'Capillary interconnection fitting and method of holding capillary tubing'20117,841,190'Freeze-thaw valve that self-limits cryogenic agent usage'20107,674,375'Closed loop flow control of a HPLC constant flow pump to enable low-flow operation'20107,332,087'Flow sensing apparatus used to monitor/provide feedback to a split flow pumping system'20087,311,502'Method for using a hydraulic amplifier pump in ultrahigh pressure liquid chromatography'20077,204,264'High pressure capillary micro-fluidic valve device and a method of fabricating same'20077,186,336'Flow sensing apparatus'20077,059,185'System and method of measuring convection induced impedance gradients to determine liquid flow rates'20066,962,077'System and method of measuring convection induced impedance gradients to determine liquid flow rates'20056,712,587'Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography'20046,557,575'Fluid flow control freeze/thaw valve for narrow bore capillaries or microfluidic devices'20036,413,398'Method for electrochemical detection'2002Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2002Based in Folsom, CA, US· patent location history
2003–2008Patents assigned to WATERS INVESTMENTS LTD (8)· patent assignee history
2003–2016Based in Milbury, MA, US· patent location history
2005–2018Based in Millbury, MA, US· patent location history
2010–2021Patents assigned to WATERS TECHNOLOGIES CORP (24)· patent assignee history
2012–2018Patents assigned to GERHARDT GEOFF C (12)· patent assignee history
2012–2016Patents assigned to FADGEN KEITH (4)· patent assignee history
2016Patents assigned to BUNNER BERNARD (2)· patent assignee history
2017–2021Based in Woonsocket, RI, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WATERS TECHNOLOGIES CORP | 24 | 2010–2021 |
| GERHARDT GEOFF Cself | 12 | 2012–2018 |
| WATERS INVESTMENTS LTD | 8 | 2003–2008 |
| FADGEN KEITH | 4 | 2012–2016 |
| BUNNER BERNARD | 2 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Millbury, Massachusetts, US | 20 | 2005–2018 |
| Woonsocket, RI, US | 7 | 2017–2021 |
| Milbury, Massachusetts, US | 6 | 2003–2016 |
| Folsom, California, US | 1 | 2002 |