Patents by Inventor Stephen H. C. Ip

Stephen H. C. Ip 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 for discriminating between unstained and absorbing dye stained cells
    Patent number: 4492752
    Abstract: Method for discriminating unstained cells from stained cells in a heterogeneous population. Specified cell types are stained with an absorbing stain and all cells are passed through the class of flow cytometry instrumentation employing focused collimated light sources. Detection of low angle and wide angle light scatter permits differentiation between the cell types on the basis that cells stained with an absorbing stain produce comparatively less low angle light scatter and comparatively more wide angle light scatter than do unstained cells.
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: January 8, 1985
    Assignee: Ortho Diagnostics Systems Inc.
    Inventors: Robert A. Hoffman, Stephen H. C. Ip