11
Stephen C Terry, John H Jerman: Miniature gas chromatograph apparatus. Microsensor Technology, Limbach Limbach & Sutton, October 2, 1984: US04474889 (46 worldwide citation)

A gas chromatography assembly has a substrate wafer with grooves and a valve seat etched therein. A plate cooperates with the wafer and the grooves to define gas channels: a carrier gas channel and a sample gas channel, each passing through the valve seat. A valve actuator is attached to the valve s ...


12
Russell L McGalliard, Gary W Larrabee: Method for cryogenic separation of carbon dioxide from hydrocarbons. Standard Oil Company, Robert B Stevenson, Arthur McIlroy, January 29, 1980: US04185978 (46 worldwide citation)

The operation of a demethanizer being used to cryogenically separate high carbon dioxide content hydrocarbon feed into liquid ethane essentially free of both methane and carbon dioxide with simultaneous production of overhead gas comprising methane and carbon dioxide without carbon dioxide icing to ...


13
Wolfgang Chlosta, Peter Pospisil: Sampler for feeding samples in gas chromatography. Bodenseewerk Perkin Elmer & Co, F L Masselle, E T Grimes, R A Hays, October 16, 1984: US04476733 (45 worldwide citation)

A plurality of samples subject to the same thermostatting time periods are directed one by one to the inlet section of a gas chromatograph for analysis in accordance with the head space method. To this end, a first heatable sample store adapted to be stepwise advanced is provided, in which thermosta ...


14
Thomas F Brodasky: Sample supply device. The Upjohn Company, Blanchard Flynn Thiel Boutell & Tanis, July 22, 1980: US04213326 (45 worldwide citation)

A sample introduction device for introducing a vaporized sample to the ion source of a mass spectrometer of a combined gas chromatography-mass spectrographic (GC/MS) apparatus. The sample introduction device replaces the jet separator of the GC/MS apparatus. The sample introduction device includes a ...


15
David P Rounbehler, Eugene K Achter, David H Fine, George B Jarvis, Stephen J MacDonald, David B Wheeler, Clayton D Wood: High speed gas chromatography. Thermedics Detection, Fish & Richardson P C, September 15, 1998: US05808178 (43 worldwide citation)

A high speed gas chromatography system includes a heated isothermal region and a gas chromatography column located externally to the isothermal region. The system also includes a detector and a flow path between the column and the detector. At least a portion of the flow path is positioned in the is ...


16
Robert E Uber, Viktor Kouznetsov, Alexander Tarassov, Byron L Carnahan, Charles W Pipich: Recirculating filtration system for use with a transportable ion mobility spectrometer in gas chromatography applications. Mine Safety Appliances Company, Titus & McConomy, April 7, 1998: US05736739 (40 worldwide citation)

Generally, the present invention provides a recirculating filtration system for use with a transportable ion mobility spectrometer in gas chromatography applications. The transportable recirculating filtration system comprises a pump and a set of filters and flow sensors connected to an ion mobility ...


17
Senya Inoue, Akira Ono, Mikio Kobayashi, Hiroshi Yokoo: Porous cordierite ceramics, a process for producing same and use of the porous cordierite ceramics. Kanto Kagaku Kabushiki Kaisha, Birch Stewart Kolasch & Birch, October 6, 1987: US04698317 (40 worldwide citation)

New type porous cordierite ceramics having a new characteristic interconnecting open cellular structure and a hollow microspherical cordierite glass powder with a shell devoid of any pores or provided with a few or an abundance of open pores which is used as a starting material for the porous cordie ...


18
R Ray Fall, Jennifer Kuzma, Michele Nemecek Marshall: Materials and methods for the bacterial production of isoprene. The Regents of the University of Colorado, Saliwanchik Lloyd & Saliwanchik, December 15, 1998: US05849970 (40 worldwide citation)

A process for the bacterial production of the hydrocarbon isoprene (2-methyl-1,3-butadiene) is described and claimed. Various bacterial species, both Gram-negative and Gram-positive, were found to produce isoprene, and a method to isolate isoprene-producing bacteria from natural sources is described ...


19
Walter R Fehr, Earl G Hammond: Soybeans having low linolenic acid and low palmitic acid contents. Iowa State University Research Foundation, Burns Doane Swecker & Mathis L, February 3, 1998: US05714670 (39 worldwide citation)

A novel soybean seed and plant designated AX7777-7-30 having ATCC Accession No. 97616 and its descendents are provided. Such soybean seed contains an endogenous linolenic acid (C18:3) content in the vegetable oil at a low level of less than about 3 percent by weight (preferably less than about 2.5 p ...


20
Andrew Tipler, Gary Campbell, Mark Collins: Analyte pre-concentrator for gas chromatography. Perkin Elmer Instruments, St Onge Steward Johnston & Reens, November 25, 2003: US06652625 (39 worldwide citation)

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 column, and/or as an adsorbent tr ...



Click the thumbnails below to visualize the patent trend.