Patents Examined by Ernest C. Therkorn
  • Apparatus for interfacing liquid chromatograph with magnetic sector spectrometer
    Patent number: 5266192
    Abstract: An apparatus and method for combining a liquid chromatograph and a magnetic sector mass spectrometer is described. The liquid chromatograph elution solvent is removed and sample particles relatively free of solvent are transported, without producing an electrical glow discharge, to the magnetic sector mass spectrometer having a chemical ionization source therein.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: November 30, 1993
    Assignee: General Electric Company
    Inventors: Woodfin V. Ligon, Steven B. Dorn
  • Isoconductive gradient ion chromatography
    Patent number: 5132018
    Abstract: An improved gradient ion chromatography process is disclosed. The process employs a gradient eluent which is maintained in a substantially isoconductive state throughout each sample run. By maintaining the gradient in an isoconductive state, conductivity detection and analysis of eluted analytes is enhanced.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: July 21, 1992
    Assignee: Millipore Corporation
    Inventors: William R. Jones, Allan L. Heckenberg, Petr Jandik