1
Frank J Yang: Multichannel pump apparatus with microflow rate capability. Trask Britt & Rossa, May 20, 1997: US05630706 (56 worldwide citation)

A multichannel pump system for HPLC and other uses has a plurality of fluid pumps whose input is fed separately to at least one high pressure mixing unit downstream of the pumps and any associated items such as pulse dampeners and pressure transducers. A pump controller is connected to control each ...


2
Frank J Yang: Narrow bore micro-particulate column packing process and product. Varian Associates, Stanley Z Cole, Keiichi Nishimura, Norman E Reitz, November 20, 1984: US04483773 (56 worldwide citation)

A process for packing narrow bore chromatographic columns and the resulting product are provided. A flexible column, preferably of fused silica, of inner diameter less than 500 .mu.m is selected. A slurry is formed in a reservoir from a mobile solvent and particles of specified diameter. For liquid ...


3
Frank J Yang, Chiko Fan: Multichannel pump apparatus with microflow rate capability. Frank Ji Ann Fu Yang, Trask Britt & Rossa, October 19, 1993: US05253981 (53 worldwide citation)

A multichannel pump system for HPLC and other uses has a plurality of fluid pumps whose input is fed separately to at least one high pressure mixing unit downstream of the pumps and any associated items such as pulse dampeners and pressure transducers. A pump controller is connected to control each ...


4
Frank J Yang, Paul B Farnsworth, Karin E Markides, Milton L Lee, Ronald J Skelton Jr: Element specific radio frequency discharge helium plasma detector for chromatography. Brigham Young University, Pennie & Edmonds, July 25, 1989: US04851683 (37 worldwide citation)

A method and apparatus for element specific detection in chromatogragphic eluents. The apparatus is comprised of a radio frequency discharge between electrodes in helium, and utilizes a low-resolution plasma emission spectrometer to monitor selected spectral emissions produced when the helium discha ...


5
Frank J Yang: Method and apparatus for on-column detection in liquid chromatography. Varian Associates, Stanley Z Cole, Norman E Reitz, March 1, 1983: US04375163 (33 worldwide citation)

On-column detection by an optical detector is accomplished with a flexible silica column. The flexible fused silica column has an inner diameter less than 500 .mu.m, an external protective coating with a stripped portion near the end of the column. The stripped portion is placed in the working path ...


6
Frank J Yang, John V Hinshaw Jr: Solute focusing technique for on-column injection in capillary gas chromatography. Varian Associates, Stanley Z Cole, Keiichi Nishimura, October 16, 1984: US04477266 (25 worldwide citation)

A solute focusing method is applied to the on-column injection of a liquid sample in gas chromatography so that relatively large sample sizes can be used without causing intolerable column flooding. The injection zone of the column is kept originally at a temperature below the solvent boiling point ...


7
Frank J Yang: Septumless jet stream on-column injector for chromatography. Varian Associates, Stanley Z Cole, Norman E Reitz, Keiichi Nishimura, October 16, 1984: US04476732 (21 worldwide citation)

A plunger seats in the outlet end of a cavity formed in an injector housing. The plunger is moveable within the cavity between seated engagement with the outlet end and a position which permits fluid to flow out the outlet end. The cavity is sealed to withstand pressures on the order of 2000 bar. A ...



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