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US 8,896,916 B2Granted
System for filtering radio frequency and infrared optical transmissions
AssigneesMadico, Inc., Optodot Corporation
InventorsPeter K. Barrett, David W. Avison, Steven Carlson
Life of this patent
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Abstract
A system of anti-surveillance security windows having one or more conductive glass substrates and one or more layers incorporating an organic radical cation compound, wherein the layers reflect in the infrared region, is demonstrated. Preferably, the organic radical cation compound is a salt of an aminium radical cation. The security windows may contain one or more layers of a multilayer interference stack of a metal/metal or metal/metal oxide design.
Claims24
A security window comprising a metal frame;
- one or more conductive glass substrates;
- and one or more layers comprising an organic free radical compound that is reflective at a range of wavelengths in the infrared;
- wherein said organic free radical compound is an aminium radical cation compound and wherein the metal frame is electrically connected to the one or more conductive glass substrates.
Dependencies are inferred from the claim text.