Patents by Inventor Yougin E. Xie

Yougin E. Xie 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).

  • Polarographic sensor and method of using same
    Patent number: 5728290
    Abstract: A polarographic sensor device to determine the partial pressure of a gas in a sample medium is disclosed. The device comprises a) a substantially hydroscopic electrolyte composition joining a pair of spaced apart electrodes, one of the pair of electrodes being a sensing electrode; b) a membrane permeable to gas but impermeable to the electrolyte, the membrane having a front section for separating the electrodes and the electrolyte from the sample medium; and c) a fastener comprising a sleeve having a body portion and a lip, the body portion retaining the fastener and a side section of the membrane, and the lip retaining a portion of the front section of the membrane and holding substantially the entire front section in a spaced apart relationship from the sensing electrode.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: March 17, 1998
    Assignee: Beckman Instruments, Inc.
    Inventors: Yougin E. Xie, Dean Y. Lin, Khan V. Nguyen, Frank R. Shu