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| Number | Title | Issue Date |
| 8182679 | Organosilanes and substrate bonded with same The present invention, provides novel silicon compounds, methods for making these novel silicon compounds, compositions comprising these novel silicon compounds attached to substrates, methods for attaching the novel silicon compounds to substrates and methods for u... | 05/22/2012 |
| 8133373 | Electrochemically driven pump A continuous electrochemical pump comprising a water generator compartment, an anode compartment on one side of said generator compartment, a cation exchange barrier, separating the generator compartment from the anode compartment, a first electrode in electrical co... | 03/13/2012 |
| 8101422 | Multidimensional chromatography apparatus and method An ion chromatography apparatus comprising: (a) a first chromatography column, (b) a second chromatography column, the volume of the second column being no greater than 0.9 times the volume of the first; and (c) valving disposed between said first and second columns... | 01/24/2012 |
| 8062515 | Parking a sample stream and suppressing the sample Pretreatment method and apparatus to remove matrix ions from a liquid sample, prior to separation of the sample analytes (e.g. by chromatography), by flowing the liquid sample into a sample compartment and stopping the flow. The sample compartment has a wall compris... | 11/22/2011 |
| 8043507 | Ion chromatography system using catalytic gas elimination A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ... | 10/25/2011 |
| 8037788 | Tight-spot fitting and driver, and method of use thereof A tight-spot fitting includes an elongated body configured to be inserted into and extracted from an aperture of a device, a user-operable head configured to be manipulated by a user to rotate the elongated body with respect to the aperture of the device, a depressi... | 10/18/2011 |
| 8021555 | Recycled suppressor regenerants A suppressed ion chromatographic apparatus using a regenerant recycle loop, comprising (a) an ion separation device, (b) a membrane suppressor, (c) a detector, (d) a container for regenerant solution, (e) a first conduit between the ion separation device and the sup... | 09/20/2011 |
| 7972781 | Detection of DNA damage The health condition of a living organism is detected by electrochemically analyzing samples from selected areas of the body of said living organism for elevated free levels of nucleotide excision products resulting from DNA or RNA damage. ... | 07/05/2011 |
| 7964411 | Membrane based concentrators A sample concentrator for concentrating analytes in a solvent-containing liquid sample stream, including concentrator housing having a sample stream flow channel and a gas stream flow channel having an inlet and an outlet, a heater for gas in the gas stream conduit,... | 06/21/2011 |
| 7922909 | Separation system, components of a separation system and methods of making and using them Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixtur... | 04/12/2011 |
| 7922908 | Separation system, components of a separation system and methods of making and using them Permeable polymeric monolithic materials are prepared in a column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized while pressure is applied through a piston having a smooth piston head in contact with the polymerization mixtur... | 04/12/2011 |
| 7908934 | Valve assembly A valve assembly includes a valve body having an inlet port and an outlet port, the valve body also having a valve chamber extending between the inlet port and the outlet port, a pair of seals each being located on opposing ends of the valve chamber; and a reciproca... | 03/22/2011 |
| 7780834 | Apparatuses and methods for electrochemically modifying the retention of species on chromatography material An apparatus and method for electrochemically modifying the retention of a species on a chromatography material is disclosed. The apparatus comprises a housing having an effluent flow channel adapted to permit fluid flow therethrough. The effluent flow channel compr... | 08/24/2010 |
| 7767462 | Electrolytic eluent generator and method of use An acid or base is generated in an aqueous solution by the steps of: (a) providing a source of first ions adjacent an aqueous liquid in a first acid or base generation zone, separated by a first barrier (e.g., anion exchange membra... | 08/03/2010 |
| 7747402 | Method, system and software application for electrochemical analysis Electrochemical analysis is performed by applying one or more time-sequenced voltage waveforms in a solution and measuring the resulting current in the solution. Raw data representative of the measured current parameters may be integrated based on one or more integr... | 06/29/2010 |
| 7704749 | Aqueous stream purifier and method of use An electrolytic method is provided for purifying an aqueous stream, including at least one contaminant ion. In one embodiment, the eluent stream flows through a purifying flow channel, including ion exchange bed, an electric field is applied through the flowing elue... | 04/27/2010 |
| 7682506 | IC system including sample pretreatment and using a single pump An IC system including sample preparation. The system includes a liquid sample injection loop, an ion concentrator, an ion separator, and only a single pump for pumping fluid through the system. ... | 03/23/2010 |
| 7632404 | Barrier with a seated ion exchange bead and method Ion transport apparatus (e.g. an electrolytic eluent generator or a suppressor for ion chromatography) in which ions in a first chamber are transported to a liquid in second chamber through a wall comprising an ion exchange bead sealed in a bead seat. The wall is ca... | 12/15/2009 |
| 7618826 | Membrane suppressor with an outlet substantially non-retentive for ionic species An apparatus for ion chromatography comprising a suppressor comprising a housing and a liquid conduit segment disposed in the housing, the liquid conduit segment including a membrane, the membrane having an inlet section adjacent the inlet of the conduit segment and... | 11/17/2009 |
| 7618535 | Suppressed chromatography and salt conversion system Method and apparatus for suppressed ion analysis in which a sample solution of analyte (e.g., anion) in an eluent of electrolyte counterions (e.g., sodium), is chromatographically separated. Then, the counterions are suppressed in a suppression zone and removed and ... | 11/17/2009 |
| 7585679 | Ion chromatography system with flow-delay eluent recycle A chromatographic method including chromatographically separating sample ionic species in an eluent stream, detecting the separated sample ionic species, catalytically combining hydrogen and oxygen gases or catalytically decomposing hydrogen peroxide in a catalytic ... | 09/08/2009 |
| 7582482 | Continuous ion species removal device and method Apparatus and method for treating a liquid sample stream including at least one analyte ion species and matrix ion species of opposite charge to said one analyte ion species. The liquid sample stream flows through a treatment channel. A carrier liquid stream includi... | 09/01/2009 |
| 7566392 | Pulsed electrochemical detection method In one embodiment, the present invention is directed to a pulsed electrochemical detection method comprising (a) flowing a liquid sample stream including at least one analyte past a working electrode in a flow-through cell; (b) applying at least three pulsed electri... | 07/28/2009 |
| 7557232 | Compositions useful as chromatography stationary phases The current invention provides compositions, which are useful as stationary phases for a variety of chromatographic applications, such as high performance liquid chromatography (HPLC). The compositions include a substrate (e.g., silica gel), covalently bound to a co... | 07/07/2009 |
| 7531075 | Method and apparatus for generating a high purity eluant An apparatus and method for electrochemically modifying the retention of a species on a chromatography material is disclosed. The apparatus comprises a housing having an effluent flow channel adapted to permit fluid flow therethrough. The effluent flow channel compr... | 05/12/2009 |
| 7524457 | Displacement chemical regeneration method and apparatus Apparatus for chromatographically separating ionic species in an aqueous electrolyte-containing eluent to form an effluent, suppressing the effluent, detecting the suppressed effluent and passing the detected effluent to a regenerant reservoir, thereby displacing th... | 04/28/2009 |
| 7517696 | Chemical suppressors and method of use A non-electrolytic method and apparatus for treating an aqueous sample stream including analyte ions and matrix ions of opposite charge, for pretreatment or suppression. The apparatus includes an ion exchange membrane capable of passing only ions of opposite charge ... | 04/14/2009 |
| 7515259 | Flow cell for optical detector and method of forming same A flow cell for optical detector includes a flow cell body, a face-seal window, and a pressed illumination window. The flow cell body is formed of an inert material and includes large and small bores, and inlet and outlet passageways in fluid communication with the ... | 04/07/2009 |
| 7473367 | Monolithic column Permeable polymeric monolithic materials are prepared in a plastic column casing. In one embodiment, the permeable polymeric monolithic materials are polymerized by the application of heat from an external source starting at a low temperature such as 40 degrees cent... | 01/06/2009 |
| 7473354 | Recycled suppressor regenerants A suppressed ion chromatographic apparatus using a regenerant recycle loop, comprising (a) an ion separation device, (b) a membrane suppressor, (c) a detector, (d) a container for regenerant solution, (e) a first conduit between the ion separation device and the sup... | 01/06/2009 |
| 7468130 | Organosilanes and substrates covalently bonded with same and methods for synthesis and use same The present invention provides novel silicon compounds, methods for making these novel silicon compounds, compositions comprising these novel silicon compounds attached to substrates, methods for attaching the novel silicon compounds to substrates and methods for us... | 12/23/2008 |
| 7402283 | Electrolytic eluent generator and method of use An acid or base is generated in an aqueous solution by the steps of: (a) providing a source of first ions adjacent an aqueous liquid in a first acid or base generation zone, separated by a first barrier (e.g., anion exchange membra... | 07/22/2008 |
| 7402243 | Organosilanes and substrate bonded with same The present invention provides novel silicon compounds, methods for making these novel silicon compounds, compositions comprising these novel silicon compounds attached to substrates, methods for attaching the novel silicon compounds to substrates and methods for us... | 07/22/2008 |
| 7399415 | Parking a sample stream and suppressing the sample Pretreatment method and apparatus to remove matrix ions from a liquid sample, prior to separation of the sample analytes (e.g. by chromatography), by flowing the liquid sample into a sample compartment and stopping the flow. The sample compartment has a wall compris... | 07/15/2008 |
| 7390386 | Aqueous stream purifier and method of use An electrolytic method is provided for purifying an aqueous stream, including at least one contaminant ion. In one embodiment, the eluent stream flows through a purifying flow channel, including ion exchange bed, an electric field is applied through the flowing elue... | 06/24/2008 |
| 7364646 | High-purity eluant generator An apparatus and method for electrochemically modifying the retention of a species on a chromatography material is disclosed. The apparatus comprises a housing having an effluent flow channel adapted to permit fluid flow therethrough. The effluent flow channel compr... | 04/29/2008 |
| 7329346 | Ion chromatography system using catalytic gas elimination A liquid chromatographic system is provided including catalytically combining hydrogen and oxygen gases in the chromatography eluent stream in a catalytic gas elimination chamber, to form water and thereby reduce the gas content in the eluent stream. Also, a liquid ... | 02/12/2008 |
| 7306720 | Membrane based volatile component-removal devices for liquid chromatography In a liquid chromatographic system, removing at least part of a volatile component from the liquid sample stream after separation by flowing it through a volatile component-removal device including a porous wall having a surface coating of a permeable polymer less t... | 12/11/2007 |
| 7303671 | Ion exchange particle-bound flow-through porous monolith A flow-through ion exchange medium comprising a monolithic stationary phase having interconnecting pores defined by pore walls, and fine ion exchange polymeric layering particles irreversibly bound directly or indirectly to the pore walls, and methods of making such... | 12/04/2007 |
| 7291395 | Coated ion exchanged substrate and method of forming A method for making an ion exchange coating (e.g., a chromatographic medium) on a substrate comprising (a) reacting at least a first amine compound comprising amino groups, with at least a first polyfunctional compound, in the presence of a substrate to form a first... | 11/06/2007 |
