Patents by Inventor Pamela D. Henderson

Pamela D. Henderson 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 of coloring crystalline material
    Patent number: 5597596
    Abstract: The invention relates to a method of coloring a crystalline material, such as sodium chloride, and a product resulting therefrom. The method provides for a step of exposing a mixture of crystalline product and liquid coloring agent to microwave energy for a time sufficient to cause drying of the mixture. When mixed with table salt and other crystallized materials, a liquid food dye containing propylene glycol can be used in the concentration of between 0.1 and 2% by total weight.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: January 28, 1997
    Inventor: Pamela D. Henderson