Thermochromic candle

US6200129A · kind A · utility

Inventors

• Michael R. Sullivan · Redmond, US
• John R. Sullivan · Laurel, US
• Paul F. Sullivan · Westwood, US
• Robert J. Sullivan · Rancho Santa Margarita, US
• Thomas Daniel Fisher · Lynnfield, US

Key dates

• Filing date: Feb 23, 1999
• Grant date: Mar 13, 2001
• Expiry date: Feb 23, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11C5/004
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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.