Class 73/23.35 - Gas chromatography

Subclass of Class 73 - Measuring and testing
Definition: Process or apparatus in which the effluent of a mixture
No. of patents: 271
Last issue date: 02/21/2012

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Number	Title	Issue Date
8117895	Gas chromatography capillary devices and methods A multicapillary bundle for use in a gas chromatograph. Each of the capillaries in the bundle is formed using a coating solution containing a stationary phase and a solvent. The capillaries are coated with the stationary phase by reducing pressure at a vacuum end of...	02/21/2012
8028562	High pressure and high temperature chromatography Methods and related systems are described for high pressure chromatographic analysis. The described system includes a flowpath adapted to flow a mobile phase and the sample at high pressures, an injector adapted to inject the fluid sample into a flowpath, a separati...	10/04/2011
8015856	Gas chromatograph with improved thermal maintenance and process operation using microprocessor control A gas chromatograph controlled by a pair of microprocessors to have improved thermal maintenance and process operation. The microprocessors are operable to run independently of each other, with one microprocessor controlling heaters and other control devices and the...	09/13/2011
7992423	Feed-through module for an analyzer A feed-through module for an analyzer, such as a gas chromatograph. The feed-through module is adapted for connection to a plurality of tubes and for conveying fluids between the tubes and an enclosed volume of a housing of the analyzer. The feed-through module incl...	08/09/2011
7908901	Cooling apparatus for microwave chromatography A cooling apparatus for a radiant energy heated oven is disclosed, where the cooling apparatus cools the oven by directing a flow of coolant through a chamber in thermal communication with the oven resulting in sub-ambient cooling, sub-ambient holds, and in chromato...	03/22/2011
7854158	Systems and methods for measurement and analysis of pipeline contaminants A system for measurement and analysis of pipeline contaminants is provided. The system includes a first assembly for engaging a pipeline from which a first fluid flow sample may be isokinetically collected for measurement of aerosol contaminants. The system also inc...	12/21/2010
7845209	Arrangement for monitoring an installation for thermal stresses An arrangement is disclosed for monitoring an installation for thermal loading, having at least one sensor and having evaluation electronics which are connected to the at least one sensor. An indicator substance is arranged at least one point or on at least one comp...	12/07/2010
7658092	Heat switch for chromatographic system and method of operation A heat switch for remote self-contained gas chromatography is disclosed. The device mechanically separates a hot or cold reservoir from the chromatography column when heating or cooling is not needed. The column needs a cooling system to obtain initial temperatures ...	02/09/2010
7509837	Method and system for chemical and physical characterization of complex samples A method and system for rapid determination of a composition, such as crude oils and fractions thereof, and s obtaining the information necessary to assess the yield of commercially valuable fuel and lube oil fractions in a single process, variations of the method a...	03/31/2009
7506533	Gas chromatograph module with an electronic device The present invention is directed to a gas chromatograph (GC) module having a column assembly and a printed circuit board mounted to a valve assembly. A plurality of electronic devices are mounted to the circuit board. The electronic devices include non-volatile mem...	03/24/2009
7409850	Systems and methods for maximizing heat transfer efficiency to and minimizing thermal gradients in an analytic column An improved gas chromatograph system includes a radiant source, an insert located to receive an output of the radiant source, and an analytic column wound on a concave surface of the insert so that successive coils of the wound analytic column are in direct contact ...	08/12/2008
7401497	Microdischarge detector method and apparatus A differential microdischarge detector system. The system comprises two microdischarge detectors (MDDs). One of the MDDs is connected to receive sample analytes to be measured, while the other MDD is connected to receive a reference sample that contains interfering ...	07/22/2008
7403113	GaN-based sensor nodes for in situ detection of gases A system for detecting chemical/biological substances and a detection method. The system comprises a plurality of sensing units or nodes and a radiofrequency link. Each unit has several sensors with different sensing curves. Each sensor is able to transmit informati...	07/22/2008
7398703	Process for the estimation of volatile substances in a sample A process for the estimation of volatile substances which comprises the steps of: (i) heating distilled water in a flask to a first temperature, (ii) adding the sample to be tested into said heated water, (iii) closing the flask, (iv) maintaining the flask containin...	07/15/2008
7383718	Single stage flow modulator for performing comprehensive chromatography A single stage flow modulator for performing comprehensive chromatography comprises a first chromatographic column, a valve fluidically coupled to at least two fluid conduits, wherein when in a first position, the valve directs a control flow to direct an output of ...	06/10/2008
7367216	Phased micro analyzer V, VI A micro fluid analyzer having a concentrator and two or more separators. The analyzer may have one, two or more pumps. The analyzer may have a hyper pre-concentrator having a number of channels. There are numerous detectors positioned along the flow path of the anal...	05/06/2008
7369945	Apparatus and method for storing and transporting data related to vapor emissions and measurements thereof The present invention provides apparatus and a methods for collecting, transmitting and storing fugitive gas emission data. An embodiment of the invention collects fugitive gas with a sampling probe and into a emission monitoring device. The device then sends and st...	05/06/2008
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
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
7361891	Pressure-flow reducer for aerosol focusing devices A pressure-flow reducer, and an aerosol focusing system incorporating such a pressure-flow reducer, for performing high-flow, atmosphere-pressure sampling while delivering a tightly focused particle beam in vacuum via an aerodynamic focusing lens stack. The pressure...	04/22/2008
7359804	System and method for calibrating remote emissions sensing instruments A system and method is provided for obtaining calibration curves for CO and CO2 during laboratory calibration of one or more remote emissions sensing (RES) instruments, and for self-calibration of on-road RES instruments to compensate for changes in backg...	04/15/2008
7353689	Liquid separator for a gas analyzer and method for separating a liquid component from gas Liquid separator for a gas analyzer and method for separating a liquid component from gas. The liquid separator comprises an input passage having an input end and an output end, an output passage having an input end and an output end, a wall formed of a gas permeabl...	04/08/2008
7348526	Microwave-assisted chromatography preparation An instrument and associated method are disclosed for preparing samples for column chromatography. The method includes the steps of applying microwave energy to a sample composition containing at least one solvent to encourage a chemical reaction and generate desire...	03/25/2008
7347080	Thermal conductivity detector A thermal conductivity detector (TCD) utilizes a modular thermistor assembly that mounts to the TCD body. The thermistor assembly is easily replaceable in the TCD. Within the TCD, a thermistor bead is always held in the same relative location in a gas flow path, whi...	03/25/2008
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
7327068	Sensors and related devices and methods Sensors that include SAW devices, related methods, and related devices. Many embodiments are included. Some of the present sensors include an inlet structure; a mounting structure that is spaced apart from the inlet structure, the mounting structure having a top sur...	02/05/2008
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
7314165	Method and system for smellprint recognition biometrics on a smartcard The present invention discloses a system and methods for biometric security using smellprint recognition biometrics in a smartcard-reader system. The biometric security system also includes a smellprint sensor that detects biometric samples and a device for verifyin...	01/01/2008
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
7293449	Thermal modulation for gas chromatography A thermal modulator device for gas chromatography and associated methods. The thermal modulator device includes a recirculating fluid cooling member, an electrically conductive capillary in direct thermal contact with the cooling member, and a power supply electrica...	11/13/2007
7284409	Thermal modulation for gas chromatography A thermal modulator device for gas chromatography and associated methods. The thermal modulator device includes a cooling member, an electrically conductive capillary in direct thermal contact with the cooling member, and a power supply electrically coupled to the c...	10/23/2007
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
7269994	Chromatograph/mass spectrometer The present invention provides a chromatograph/mass spectrometer capable of producing a composite chromatogram from plural chromatogram signals without causing the baseline level to rise or the intensity of the chromatogram peak to decrease. The chromatograph/mass s...	09/18/2007
7267709	Methods and systems for characterizing a sorbent tube Disclosed are systems and methods that include providing a vessel having an adsorbent disposed therein, the vessel having an inlet and an outlet for communicating a carrier gas through the vessel; determining a differential pressure between the inlet and the outlet ...	09/11/2007
7258726	Method and apparatus for measuring velocity of chromatographic pulse An Apparatus and method for two-stage chromatographic separation uses thermal modulation. The chromatographic column or modulation tube (1) has a loop structure such that two portions of modulation tube (1) can be thermally modulated simultaneously by ...	08/21/2007
7241424	Apparatus for screening catalysts in a parallel fixed-bed reactor The present invention discloses an apparatus and method for rapid analysis of members of a combinatorial library. The apparatus includes a plurality of vessels for containing individual library members and a fluid handling system that apportions a test fluid about e...	07/10/2007
7237430	Method and apparatus for enhanced detection of a specie using a gas chromatograph The invention includes a method and apparatus for a chromatography system having a chromatographic column for separating gases in a mixture from one another and an electrochemical gas sensor coupled to the chromatographic column for detecting a gas being emitted fro...	07/03/2007
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
7204125	Pressure activated sampling system Screening of items for the presence of contaminants, such as explosives residue, is accomplished by subjecting an item loaded into a pressure chamber to a pressure substantially in excess of atmospheric pressure conditions and rapidly decompressing the item to the a...	04/17/2007
7201874	System for automatically extracting and analyzing residual solvents in material samples A system for quickly and automatically extracting and analysing residual solvents is realised for operating directly in the premises where the packing materials are being manufactured, printed and/or laminated. The system provides for a single unit equipped w...	04/10/2007

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Class 73/23.35 - Gas chromatography