Patents by Inventor Kelvin W. Yu

Kelvin W. Yu 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).

  • Hot melt ink for transparency applications
    Patent number: 5597856
    Abstract: Phase change inks capable of passing light therethrough are suitable for color overhead transparencies, as well as plain paper printing. A composition for the ink carrier comprises an unsaturated bis-amide as a transparency enhancer, a low viscosity monoamide as a thinner material, and a polyamide resin as a base and binder.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: January 28, 1997
    Assignee: Dataproducts Corporation
    Inventors: Kelvin W. Yu, Susan Schnitzel