Photochromatic tattoo
OwnerGeorge H. Carrollinventor
Life of this patent
Estimating the term…
Abstract
A tattoo that is invisible to the naked eye until the tattoo is exposed to ultraviolet radiation, whereupon the tattoo becomes visible to the naked eye, and which reverts to invisible upon removal from exposure to ultraviolet radiation. The tattoo is formed by embedding in the skin a mixture including a non-pigmented carrier and one or more photochromic compounds that undergo a photochemical transformation from colorless to colored upon exposure to ultraviolet radiation, and which revert to colorless upon removal from exposure to ultraviolet radiation.
Claims6
A method of producing a tattoo that is not visible to the naked eye until the tattoo is exposed to ultraviolet radiation, comprising the steps of:
- providing a colorless carrier suitable for embedding in the skin of a human;
- mixing in the carrier one or more photochromic compounds that appear colorless and are invisible to the naked eye until exposed to ultraviolet radiation, and which undergo a photochemical transformation from colorless to colored upon exposure to ultraviolet radiation, thereby becoming visible to the naked eye, and which revert to colorless following elapse of a predetermined interval of time upon removal from exposure to ultraviolet radiation, thereby becoming visible to the naked eye;
- and
- embedding the mixture of carrier and photochromic compound transdermally in the skin of a human to form a tattoo.
Dependencies are inferred from the claim text.