Patents by Inventor Thomas Daniel Fisher

Thomas Daniel Fisher 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).

  • Thermochromic candle
    Patent number: 6200129
    Abstract: A candle capable of changing color when lighted is disclosed. More particularly, the candle incorporates thermochromic dyes that are a first color at room temperature and a second color upon being raised to an activation temperature. The color change is preferably reversible so that upon cooling, the portions of the candle that underwent a color change return to their original color.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: March 13, 2001
    Inventors: Michael R. Sullivan, John Raymond Sullivan, Paul Francis Sullivan, Robert Joseph Sullivan, Thomas Daniel Fisher