Encrypted optical markers for security applications
First Claim
1. A method for cryptically marking an item, the method comprising:
- providing a polymerizable pro-fluorophore being capable of producing a fluorescent compound upon reaction with a developer, andforming a DNA security marker that comprises DNA and said polymerizable pro-fluorophore;
attaching the security marker to the item;
and thereby providing a cryptically marked item.
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Accused Products
Abstract
Encrypted markers that are not readily detectable can be revealed by treatment with a specific reagent used as a developer to reveal a readily detectable physical property of the marker, such as a characteristic fluorescence emission after excitation with a particular excitation wavelength, or to reveal a visible color. The encrypted marker can be developed in situ, or a sample can be removed by brushing, scraping, swabbing or scratching the marked object or item and developing the encrypted marker or a sample thereof with the appropriate developer to reveal an overt marker or optical signal. The marker can be revealed by exposure of the encrypted marker or a sample thereof to the developer in any suitable form, such as a solution, a slurry, a swab, a solid (such as in granular form), or a gas or a vapor that includes a developer.
215 Citations
19 Claims
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1. A method for cryptically marking an item, the method comprising:
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providing a polymerizable pro-fluorophore being capable of producing a fluorescent compound upon reaction with a developer, and forming a DNA security marker that comprises DNA and said polymerizable pro-fluorophore; attaching the security marker to the item; and thereby providing a cryptically marked item. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification