Hair treatment method
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United States of America Patent
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-
Jul 12, 2005
Grant Date -
May 13, 2004
app pub date -
Jun 18, 2003
filing date -
Nov 8, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A hand held device generates a predetermined number of pulses of light having a predetermined electromagnetic spectrum, a predetermined duration, a predetermined inter-pulse interval, and a predetermined total energy. The pulse sequence is delivered to a skin surface to temporarily remove hair through the absorption of light energy only by endogenous chromophores of the hair. Exogenous chromophores for light absorpotion are not applied to the skin surface at any time. A period of time for reappearance of hair on the selected skin surface after the using of the device to remove hair from the selected skin surface is determined by counting the days to hair reappearance after a test light application. Subsequently, the device is used periodically to apply the pulses of light to the selected skin surface at intervals of shorter length than the determined period of hair regeneration, thereby temporarily maintaining the selected skin surface free of visible hair.
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