Patents by Inventor Winfred Tee Chow

Winfred Tee Chow 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).

  • Particle suspensions used as low-contrast standards for inspection of liquids
    Patent number: 9562846
    Abstract: In certain embodiments, a method for validating the human visual inspection process or an optical analysis instrument for use with biological particles may include inspecting a standard particle solution using the optical analysis instrument. The standard particle solution may include a known concentration of standard particles suspended in solution with the standard particles having a defined size and shape distribution. The standard particles may have a refractive index that is substantially similar to a refractive index of the biological particles. The method may include assessing a concentration of standard particles in the standard particle solution from the inspection. The method may include assessing a difference between the assessed concentration of standard particles and the known concentration of standard particles. The method may include modifying one or more parameters of the optical analysis instrument based on the assessed difference between the concentrations.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: February 7, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Francisco Kole, Johannes G. M. Christiaanse, Greg Kirk, Winfred Tee Chow
  • PARTICLE SUSPENSIONS USED AS LOW-CONTRAST STANDARDS FOR INSPECTION OF LIQUIDS
    Publication number: 20150015872
    Abstract: In certain embodiments, a method for validating the human visual inspection process or an optical analysis instrument for use with biological particles may include inspecting a standard particle solution using the optical analysis instrument. The standard particle solution may include a known concentration of standard particles suspended in solution with the standard particles having a defined size and shape distribution. The standard particles may have a refractive index that is substantially similar to a refractive index of the biological particles. The method may include assessing a concentration of standard particles in the standard particle solution from the inspection. The method may include assessing a difference between the assessed concentration of standard particles and the known concentration of standard particles. The method may include modifying one or more parameters of the optical analysis instrument based on the assessed difference between the concentrations.
    Type: Application
    Filed: July 7, 2014
    Publication date: January 15, 2015
    Inventors: Francisco Kole, Johannes G. M. Christiaanse, Greg Kirk, Winfred Tee Chow