Patents by Inventor Yung-Fong Cheng

Yung-Fong Cheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for effecting capillary electrophoresis fraction collection on a membrane
    Patent number: 5126025
    Abstract: A sample is injected into a capillary tube of a capillary electrophoresis apparatus. A sample solute on a porous layer is positioned in contact with an entrance end of the capillary tube and electrodes are positioned at the entrance end and exit end of the tube. The separated sample is collected at the exit end of the tube.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: June 30, 1992
    Assignee: Millipore Corporation
    Inventors: William W. Carson, Yung-Fong Cheng, Martin Fuchs
  • Method and apparatus for effecting capillary sample injection into electrophoresis apparatus
    Patent number: 5120414
    Abstract: An electrode structure is provided for feeding a solute sample to a capillary electrophoresis separation process. The apparatus comprises a conductive plate connected to an electrical lead and an absorbent layer wet with an electrolyte solution and positioned on the plate. A membrane containing a sample is positioned on the absorbent layer in contact with an entrance end of a capillary tube forming part of the separation process. The sample is fed to the entrance part by electromigration and/or electrosmosis under the influence of an electric field induced by an electrode.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: June 9, 1992
    Assignee: Millipore Corporation
    Inventors: William W. Carson, Yung-Fong Cheng