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| Number | Title | Issue Date |
| 7867325 | Gas chromatographic device A gas chromatographic device comprises an inlet system and a chromatography column. The inlet system includes a liner having pressure reducing means contained therein for reducing pressure between an inlet of the pressure reducing means and an outlet of the pressure... | 01/11/2011 |
| 7585357 | Multiple use septum for injection ports for gas chromatography or the like A new septum for multiple use injection ports enabling the introduction of fluid materials by needle injection into a gas chromatograph or other system under positive pressure. The injection port utilizes a special septum to seal the port while accommodating passage... | 09/08/2009 |
| 7517395 | Seal having low friction non-stick surface layer An inlet assembly for introducing a sample into a carrier gas stream for gas chromatography is disclosed including a housing having a bore that receives a liner. A sealing member having a core with a surface layer is positioned within the bore in sealing engagement ... | 04/14/2009 |
| 7485176 | Compact thermal conductivity detector A thermal conductivity detector comprises a housing having an internal cavity, a fluid inlet, a fluid outlet, a first bore and a second bore. The thermal conductivity detector further comprises a thermistor having a first electrical lead and a second electrical lead... | 02/03/2009 |
| 7384453 | Self-contained chromatography system A self-contained chromatography system is provided and includes a chromatography column, a carrier gas reservoir containing a carrier gas and an analyte stream processing device, wherein the carrier gas reservoir is disposed upstream from the chromatography column a... | 06/10/2008 |
| 7384457 | Seal for gas chromatography A seal forming a fluid tight connection between a gas chromatography column and a sample inlet assembly is disclosed. The seal is formed by a metal injection molding process. The seal has a first surface adapted for sealing with the sample inlet assembly and a secon... | 06/10/2008 |
| 7361208 | Chromatography oven with heat exchange and method of use Methods and systems for cooling gas chromatography ovens that comprise a housing having a fluid entry and a sleeve positioned within the housing to provide a fluid gap between the inner surface of the housing and the outer surface of the sleeve, where the sleeve is ... | 04/22/2008 |
| 7360394 | Multi-purpose modular pyrolysis and thermal processing system for chemical and biological threat agent detection A multi-purpose modular pyrolysis and thermal processing system (MPMPTPS) for pyrolyzing and/or vaporizing liquids and solids to create an evolved vapor suitable for introduction into a gas-chromatography and/or vapor detection system, thereby allowing detection, cl... | 04/22/2008 |
| 7361206 | Apparatus and method for water vapor removal in an ion mobility spectrometer The present invention is directed to an apparatus and a method for continuously removing water vapor from a closed loop, re-circulated gas flow in an ion mobility spectrometer using a water permeable membrane, having a first side and a second side opposite the first... | 04/22/2008 |
| 7343779 | High performance, hand-held gas chromatograph, method and system A hand-held, ultra-sensitive gas chromatograph which provides real time detection and analysis of chemical compounds or impurities is disclosed. The detection sensitivity ranges from parts per trillion to parts per million with an average retention time ranging from... | 03/18/2008 |
| 7316730 | Inlet double-seal assembly An inlet seal assembly for sealing an injection port member in a chromatography instrument , comprising an injection port member having a raised metal ring, an inlet seal member with an upper surface, a peripheral groove formed in the inlet seal member upper surface... | 01/08/2008 |
| 7311757 | Analyte pre-concentrator for gas chromatography An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube having a restricted outlet and packed with an adsorbent, wherein the tube serves as the liner of a chromatographic injector, as an adsorbent trap coupled to a chromatographic... | 12/25/2007 |
| 7306656 | Gas chromatography apparatus The invention relates to a gas chromatography apparatus with a cooling device, wherein the cooling device includes a closed cooling circuit containing a refrigerant, so that no refrigerant is wasted. ... | 12/11/2007 |
| 7306649 | 3D miniature preconcentrator and inlet sample heater The present invention relates to a three dimensional preconcentrator and inlet heater. The preconcentrator consists of a substrate with passageways, a conductive material coated to the top and the bottom of the substrate and an adsorbent coating covering the entire ... | 12/11/2007 |
| 7284410 | Chromatographic interface for thermal desorption systems Disclosed are systems and methods that include a thermal desorption unit, a chromatographic column, and an interface device between the unit and the column. The interface device controls the fluid flowing into the column, such as by providing additional carrier gas ... | 10/23/2007 |
| 7273518 | Gas chromatograph system including an improved inlet sealing mechanism An inlet includes a bottom assembly and a top assembly. The bottom assembly includes at least one male unit, and the top assembly has at least one beveled surface and includes at least one female unit and a lateral driving unit. The top assembly is placed inside the... | 09/25/2007 |
| 7260978 | Gas chromatography/mass spectrometry system A gas chromatography/mass spectrometry system includes two sample introduction parts, a gas chromatography part having two columns, a column oven for housing the two columns in a parallel configuration, an interface part through which an outlet end of each of the tw... | 08/28/2007 |
| 7247189 | Device for combining two fluid streams A fluidic switching device is particularly for use in chromatography is described. The device allows a rapid switching between chromatographic columns; particularly, in gas chromatography. ... | 07/24/2007 |
| 7219532 | System for regulating fluid flowing through chromatographic column Disclosed are systems and methods that include a sampling device, a chromatographic column, and a transfer line through which a fluid containing analytes to be measured are communicated from the sampling device to the column. The pressure at which the fluid containi... | 05/22/2007 |
| 7185550 | Time domain resolving chemical sampler using sorbent material A fluid sampling device is provided comprising an elongated housing having a longitudinal axis, a plurality of alternating sorbent units and spacer units disposed longitudinally through the housing and slidably movable therethrough along the longitudinal direction, ... | 03/06/2007 |
| 7157055 | Apparatus for sample handling for an injection system of a chromatograph The invention relates to an apparatus for sample preparation and/or sample delivery for an injection system of a chromatograph, having a magazine (1), which can be moved in steps, for juxtaposed sample tubes (2), and having a lifting device (6) ... | 01/02/2007 |
| 7128228 | Container closure A closure means adapted to fit into the neck or mouth of a container, said closure means comprising a plug of resilient material said plug incorporating a slit which extends through the body of the plug characterized that, in a resting configuration and prior to ins... | 10/31/2006 |
| 7105043 | Sealing mechanism for gas chromatograph machines A sealing mechanism for a gas chromatograph machine includes a weldment attachment mountable at the weldment assembly of the machine. The attachment has a passage therethrough for gas communicated to the weldment assembly. An actuator imparts a direct force on the w... | 09/12/2006 |
| 7008532 | Chromatographic device having an elongate rod and method of forming and chromatographic device A chromatographic device comprises a chromatographic tube, a chromatographic medium, a piston assembly, an elongate rod, and a threaded member. The piston assembly is within the tube and is positioned generally between a first end of the tube and the chromatographic... | 03/07/2006 |
| 6974495 | Analyte pre-concentrator for gas chromatography An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube having a restricted outlet and packed with an adsorbent, wherein the tube serves as the liner of a chromatographic injector, as an adsorbent trap coupled to a chromatographic... | 12/13/2005 |
| 6955709 | Method and device for vaporization injection of high volumes in gas chromatographic analysis This invention concerns a method and apparatus for vaporization injection of large volumes of liquid sample (substance to be analysed+solvent) introduced by a syringe needle into a heated vaporization chamber which is part of an injector coupled operatively to a dev... | 10/18/2005 |
| 6929678 | Purge and trap concentrator with improved drying A purge and trap concentrator and a method for drying a stream of sample gas in a gas analysis instrument. A dryer tube has an inlet that receives a stream of sample gas during a drying interval and receives a stream of dry gas during a regeneration interval. The dr... | 08/16/2005 |
| 6928858 | Apparatus and method for thermal conductivity detection in gas chomatography equipment A thermal conductivity detector includes separate sample gas and reference gas chambers. Each chamber has a gas inlet and a gas outlet and a sensor. The chambers are connected by at least one passageway. For example, a passageway can extend from the sample gas chamb... | 08/16/2005 |
| 6920777 | Intake cross-sheets for gas chromatographic oven An apparatus, system and method reduce the cool down time of GC ovens by supplying larger volumes of air through oven intake ducts. The system and method provide intake cross-sheets in an oven intake duct to reduce airflow spin, increasing the flow rate of fresh air... | 07/26/2005 |
| 6913934 | Apparatus and methods for parallel processing of multiple reaction mixtures A cannula for use in transferring small volumes of fluid materials, such as in a parallel reaction process. The cannula comprises a long thin needle having various end (port) configurations, and an adapter for connecting the needle to a fluid line. The adapter may i... | 07/05/2005 |
| 6905595 | Scalable liquid distribution system for large scale chromatography columns A uniform fluid distribution system (2) for use with a liquid transfer system (100) for maintaining an interface between liquid phases within a large scale separator system including a cell into which liquid may be introduced as discrete phases at an i... | 06/14/2005 |
| 6814785 | Analyte pre-concentrator for gas chromatography An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube having a restricted outlet and packed with an adsorbent, wherein the tube serves as the liner of a chromatographic injector, as an adsorbent trap coupled to a chromatographic... | 11/09/2004 |
| 6783673 | Composite chromatography column Apparatus for chromatography, featuring a composite chromatography column including a tubular member having an inlet end and an outlet end, where the tubular member includes an innermost first layer comprised of a first material and a second layer comprised of a sec... | 08/31/2004 |
| 6719826 | Method and apparatus for sample injecting in gas chromatography A method and an apparatus for sample injection in gas chromatography increases the injecting volume of a sample, and can analyze any of high-boiling-point compounds, low-compounds boiling-point compounds, and compounds decomposed by heat. A sample is injected into a... | 04/13/2004 |
| 6706091 | Sub-to super-ambient temperature programmable microfabricated gas chromatography column A sub- to super-ambient temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by combining a thermoelectric cooler and temperature sensing on the microfabricated column. Su... | 03/16/2004 |
| 6666907 | Temperature programmable microfabricated gas chromatography column A temperature programmable microfabricated gas chromatography column enables more efficient chemical separation of chemical analytes in a gas mixture by the integration of a resistive heating element and temperature sensing on the microfabricated column. ... | 12/23/2003 |
| 6662626 | Assembly for desorbing sampling tubes; adapter and sampling tubes for such an assembly; and kit of parts for forming such an assembly An assembly for desorbing sampling tubes comprises a gas chromatograph known per se provided with an injector. The sampling tubes are provided with an inflow opening and an outflow opening. The assembly comprises an adapter which is placed in the injector... | 12/16/2003 |
| 6663697 | Microfabricated packed gas chromatographic column A new class of miniaturized gas chromatographic columns has been invented. These chromatographic columns are formed using conventional micromachining techniques, and allow packed columns having lengths on the order of a meter to be fabricated with a footp... | 12/16/2003 |
| 6652625 | Analyte pre-concentrator for gas chromatography An analyte pre-concentrator for gas chromatography is disclosed generally comprising a tube having a restricted outlet and packed with an adsorbent, wherein the tube serves as the liner of a chromatographic injector, as an adsorbent trap coupled to a chro... | 11/25/2003 |
| 6638346 | Vaporization injector A vaporization injector for gas chromatography analysis instruments, of the type including a vaporization chamber, heated or which may be heated, with a longitudinally elongated shape, a device for hermetically inserting the needle of a syringe containing... | 10/28/2003 |
