79 patents
Page 3 of 4
Utility
Replaceable Emitter Assembly for Interfacing a Separation Column to a Mass Spectrometer
18 Nov 21
An electrospray emitter assembly for interfacing a separation column to a mass spectrometer is disclosed.
Brandon Howard ROBSON, Xuefei SUN, Xiaodong LIU
Filed: 24 May 21
Utility
Sulfonamide Based Anion Exchange Resins
7 Oct 21
An ion exchange resin for use as a stationary phase in an ion chromatography column.
Melvin Hatch, Christopher A. Pohl, Manikandan Jayaraman
Filed: 22 Jun 21
Utility
Nebulizer for charged aerosol detection (CAD) system
5 Oct 21
A nebulizer for a charged aerosol detection (CAD) system is disclosed.
Alan Daniel Yim, Paul H. Gamache, Ryan S. McCarthy
Filed: 11 Dec 17
Utility
Apparatus for parallel accelerated solvent extraction
21 Sep 21
A parallel accelerated solvent extraction system includes a plurality of extraction cells, a temperature controlled zone for maintaining the plurality of extraction cells at a desired temperature, a plurality of collection vessels, each fluidly coupled to a respective extraction cell via a flow restrictor configured to maintain a pressure, a solvent pump for supplying extraction solvent to the plurality of extraction cells, and a switching valve for sequentially directing extraction solvent flowing from the solvent pump to respective ones of the plurality of extraction cells.
Kannan Srinivasan, SM Rahmat Ullah
Filed: 13 Feb 13
Utility
Fast startup ion chromatography system and methods
31 Aug 21
Systems and methods for inhibiting translocation of ions across ion exchange barriers include an eluent generator having an ion source reservoir with a first electrode, an eluent generation chamber with a second electrode, an ion exchange barrier disposed therebetween, and means for reversing the polarity of a voltage or current applied across the first and second electrodes.
Kannan Srinivasan, Mrinal Sengupta, Yan Liu, Christopher A. Pohl, Nebojsa Avdalovic
Filed: 10 Oct 17
Utility
Gas-less electrolytic device and method
17 Aug 21
An electrolytic device, e.g. a suppressor, including at least two flow-through channels separated by a charged membrane barrier, and a catalyst, for combining hydrogen and oxygen gas, together with ion exchange material, disposed in one of the channels.
Kannan Srinivasan, Sheetal Bhardwaj, Rong Lin
Filed: 5 Dec 13
Utility
Chromatographic Material Having Improved PH Stability, Method for Preparation Thereof and Uses Thereof
15 Jul 21
A chromatographic material including a substrate having a surface and having a polymeric layer covalently bound to the surface; the polymeric layer comprising polymer molecules covalently attached to the surface of the substrate, each polymer molecule being attached to the surface via multiple siloxane bonds and each polymer molecule being connected to one or more functionalizing compounds that each comprise a functional group, wherein the polymeric layer is formed by covalently attaching polymer molecules to the surface of the substrate via multiple siloxane bonds, each polymer molecule containing multiple first reactive groups, and reacting the first reactive groups of the attached polymer molecules with at least one functionalizing compound that comprises a second reactive group that is reactive with the first reactive groups and that further comprises a functional group.
Xiaodong LIU, Xiao CUI, Xuefei SUN
Filed: 11 Jan 21
Utility
Electrolytic Eluent Generators with Stabilized Operating Voltages
17 Jun 21
An electrolytic eluent generator includes an electrolyte reservoir, an eluent generation chamber, and an ion exchange membrane stack.
Zhongqing LU, Yan LIU, Christopher A. POHL, Jinhua CHEN, Jun CHENG
Filed: 16 Dec 19
Utility
Anion Exchange Stationary Phases Based on a Polyalkylpolyamine Polymer Layer
3 Jun 21
An anion exchange for separating a plurality of carbohydrates includes a negatively charged substrate particle.
Christopher A. Pohl, Jinhua Chen
Filed: 15 Feb 21
Utility
Vial Cap and Method for Removing Matrix Components from a Liquid Sample
3 Jun 21
A vial cap for removing a matrix component from a liquid sample is described.
Christopher A. POHL, Rosanne W. SLINGSBY
Filed: 12 Feb 21
Utility
Methods and systems for optimizing buffer conditions with liquid chromatography
1 Jun 21
A plurality of chromatograms is run using a salt gradient with a range of constant pH values or using a pH gradient with a range of constant salt concentrations.
Shanhua Lin Liehr, Jung Un Baek, Christopher A. Pohl, Mark Lee Tracy, Xiadong Liu
Filed: 9 Jun 19
Utility
Replaceable emitter assembly for interfacing a separation column to a mass spectrometer
25 May 21
An electrospray emitter assembly for interfacing a separation column to a mass spectrometer is disclosed.
Brandon Howard Robson, Xuefei Sun, Xiaodong Liu
Filed: 20 Apr 20
Utility
Longitudinal Gradient Chromatography Columns
6 May 21
An ion exchange chromatography column contains an ion exchange stationary phase that includes a charged substrate, a plurality of first particles, and a plurality of second particles.
Christopher A. Pohl
Filed: 4 Nov 19
Utility
Flow control in an electrolytic reagent concentrator for ion chromatography
16 Mar 21
An in-line electrolytic reagent concentrator device that circumvents the need for additional pumps and supplies of reagents to support operation of a carbonate or ammonia removal device.
Kannan Srinivasan, Mrinal Sengupta, SM Rahmat Ullah
Filed: 3 Mar 17
Utility
Vial cap and method for removing matrix components from a liquid sample
16 Feb 21
A vial cap for removing a matrix component from a liquid sample is described.
Christopher A. Pohl, Rosanne W. Slingsby
Filed: 7 Nov 19
Utility
Functionalized Polyolefin Capillaries for Open Tubular Ion Chromatography
21 Jan 21
Open tubular capillary columns for liquid and ion chromatography, based upon an ionically impermeable polyolefin capillary having a bore with a sulfonate-group- or amine-group-functionalized internal surface.
Purnendu K. DASGUPTA, Weixiong HUANG, Christopher A. POHL
Filed: 16 Sep 20
Utility
Method of measuring an analyte with a reductive detection waveform
28 Dec 20
An analyte concentration can be measured at an electrochemical detector using a waveform that includes a reductive voltage.
Jun Cheng, Yan Liu
Filed: 19 Dec 16
Utility
Methods and Systems for Optimizing Buffer Conditions with Liquid Chromatography
9 Dec 20
A plurality of chromatograms is run using a salt gradient with a range of constant pH values or using a pH gradient with a range of constant salt concentrations.
Shanhua Lin Liehr, Jung Un Baek, Christopher A. Pohl, Mark Lee Tracy, Xiadong Liu
Filed: 8 Jun 19
Utility
Replaceable Emitter Assembly for Interfacing a Separation Column to a Mass Spectrometer
18 Nov 20
An electrospray emitter assembly for interfacing a separation column to a mass spectrometer is disclosed.
Brandon Howard ROBSON, Xuefei SUN, Xiaodong LIU
Filed: 19 Apr 20
Utility
Method of calibrating a chromatography system
12 Oct 20
A method of calibrating, a chromatography system is described.
Christopher A. Pohl
Filed: 14 Mar 13