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Class Information
Number: 73/23.42
Name: Measuring and testing > Gas analysis > Gas chromatography > Detail of gas handling means
Description: Subject matter wherein significance is attributed to the means for confining, directing, or controlling the flow of gaseous material.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8701464 Methods and devices for circulating air Apr. 22, 2014
8683846 Gas chromatograph with digital processing of a thermoconductivity detector signal Apr. 1, 2014
8656754 Gas chromatograph apparatus Feb. 25, 2014
8642351 Apparatus and methods of fluid chromatography Feb. 4, 2014
8621912 Natural gas analyzer on a micro-chip Jan. 7, 2014
8613215 Apparatus and method for multi-dimensional gas chromatography Dec. 24, 2013
8607615 Microfabricated thermal modulator for comprehensive 2D gas chromatography Dec. 17, 2013
8592755 Method of switching ports of a switching valve of a gas chromatography-mass spectrometry apparatus Nov. 26, 2013
8578755 Device for providing gases, in particular for isotopic ratio analysis Nov. 12, 2013
8569070 Connection assembly for ultra high pressure liquid chromatography Oct. 29, 2013
8549894 Gas chromatography with ambient pressure stability control Oct. 8, 2013
8512457 Differential acceleration chromatography Aug. 20, 2013
8506688 Gas chromatographic device Aug. 13, 2013
8499615 Gas chromatograph comprising a controllable switching device Aug. 6, 2013
8492152 Method and apparatus for determining formation fluid composition Jul. 23, 2013
8475715 Resonant sensor systems and methods with reduced gas interference Jul. 2, 2013
8470072 Method and apparatus for the control of gas pressure in gas chromatography columns Jun. 25, 2013
8408044 Automated systems and methods for detection of chemical compounds Apr. 2, 2013
8402814 Method and device for the analysis of isotope ratios Mar. 26, 2013
8404185 Adsorbent housing with separated adsorption outflow and desorption inflow Mar. 26, 2013
8367413 Determining formation fluid composition Feb. 5, 2013
8357234 Apparatus and method for rapid separation and detection of hydrocarbon fractions in a fluid stream Jan. 22, 2013
8347688 Method and apparatus for sample analysis Jan. 8, 2013
8343258 Apparatus and method for controlling constant mass flow to gas chromatography column Jan. 1, 2013
8322189 Comprehensive two-dimensional gas chromatography method with one switching valve as the modulator Dec. 4, 2012
8308854 Helium reclamation systems and methods for a gas chromatograph Nov. 13, 2012
8303694 Chromatography systems and methods using them Nov. 6, 2012
8297106 Gas chromatography system and method Oct. 30, 2012
8297107 System for regulating fluid flowing through chromatographic column Oct. 30, 2012
8281809 Aerosol inlet flow modulator Oct. 9, 2012
8277544 Thermal modulation device for two dimensional gas chromatography Oct. 2, 2012
8256747 Closed-loop sensor tester for simulating open-area releases Sep. 4, 2012
8250904 Multi-stage injector for fluid analysis Aug. 28, 2012
8240334 Arrangement for metering a gaseous sample in a carrier gas stream Aug. 14, 2012
8230719 Method for identifying the composition of a sample Jul. 31, 2012
8191402 Monitoring device of gas introducing device for analyzer Jun. 5, 2012
8182768 Interface assembly for pre-concentrating analytes in chromatography May. 22, 2012
8176770 Sniffer leak detector May. 15, 2012
8171773 Sniffing leak detector May. 8, 2012
8167987 Methods and systems for cooling a chromatographic column May. 1, 2012
8152909 Gas chromatography check valve and system Apr. 10, 2012
8141411 Method for determining a low cylinder pressure condition for a gas chromatograph Mar. 27, 2012
8137437 Vapour generators Mar. 20, 2012
8132443 Microfabricated gas chromatograph Mar. 13, 2012
8123841 Column design for micro gas chromatograph Feb. 28, 2012
8104326 Methods and devices for circulating air Jan. 31, 2012
8099995 Choked flow isolator for noise reduction in analytical systems Jan. 24, 2012
8092744 Analytical chemical sampling system with bypass mode Jan. 10, 2012
8062905 Purge and trap concentrator with sparge vessel Nov. 22, 2011
8043565 Analytical instrumentation and processes Oct. 25, 2011

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