Back to results
US 8,298,655 B2Granted
Solar heat responsive exterior surface covering
AssigneeCertainTeed Corporation
InventorsHusnu M. Kalkanoglu, Ming Liang Shiao, Keith C. Hong, Gregory F. Jacobs
Life of this patent
Estimating the term…
Abstract
An exterior surface covering has a colored outer layer that transmits infrared radiation and an inner layer with a thermochromic pigment that absorbs heat at low temperature and reflects at high temperatures. The outer layer conceals the color change of the thermochromic pigment.
Claims6
An exterior surface covering comprising:
- (a) an outer colored layer having a transmission coefficient of at least 50 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers;
- (b) a middle layer having a transmission coefficient for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers, the transmission coefficient being dependent on a variable parameter, the transmission coefficient varying by a factor of at least 0.5 as the parameter is varied over a predetermined range;
- and
- (c) an inner layer having a reflectance of at least 40 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers.
1 more element
An exterior surface covering comprising:
- (a) an outer colored layer having a transmission coefficient of at least 50 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers;
- (b) a middle layer having a transmission coefficient for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers, the transmission coefficient being dependent on a variable parameter, the transmission coefficient varying by a factor of at least 0.5 as the parameter is varied over a predetermined range;
- and
- (c) an inner layer having an absorption coefficient at least 60 percent for electromagnetic radiation in the wavelength range from 700 nanometers to 2500 nanometers.
1 more element
Dependencies are inferred from the claim text.