US Patent No: 8,169,685
Number of patents in Portfolio can not be more than 2000
Thermally switched absorptive window shutter
Stats
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May 1, 2012
Issued date -
Dec 19, 2008
filing date -
12/340,552
serial no -
In Force
status
Importance
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Abstract
The thermally switched absorptive optical shutter may be a self-regulating “switchable absorber” device that may absorb approximately 100% of incoming light above a threshold temperature, and may absorb approximately 50% of incoming light below a threshold temperature. The shutter may be formed by placing a thermotropic depolarizer between two absorptive polarizers. This control over the flow of radiant energy may occur independently of the thermal conductivity or insulation of the shutter device and may or may not preserve the image and color properties of incoming visible light. This has energy-efficiency implications as it can be used to regulate the internal temperature and illumination of buildings, vehicles, and other structures without the need for an external power supply or operator signals. It also has aesthetic implications since the shutter device has unique optical properties that are not found in traditional windows, skylights, stained glass, light fixtures, glass blocks, bricks, or walls. Additionally, the shutter device may have application as a building material.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
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Patent Citation Ranking
Maintenance Fees
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| Fee | Large entity fee | small entity fee | micro entity fee |
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| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
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