Patents by Inventor Robert B. Shibuya

Robert B. Shibuya 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).

  • Plasma forming device
    Patent number: 5423989
    Abstract: Devices are provided for producing plasma or serum from blood samples, where the plasma or serum is substantially free of red blood cells, hemoglobin, and metabolites and degradation products thereof. The sample can be used in various assays without interference from the interfering components of red blood cells.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: June 13, 1995
    Assignee: Chemtrack, Inc.
    Inventors: Michael P. Allen, Robert B. Shibuya
  • Direct measuring assay strip and method of use thereof
    Patent number: 4999287
    Abstract: Methods and compositions are provided for measuring an analyte without instrumentation. The device employs a stripstick which may include as its components, a discontinuous flow path, which is made continuous after transfer of the sample, means for automatically metering the volume of a sample, and means for providing a sharply delineated color front. The method finds particular use where a limited amount of substrate is provided for an enzyme on a sample pad.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: March 12, 1991
    Assignee: Chemtrak Corporation
    Inventors: Michael P. Allen, Robert B. Shibuya