发明名称 |
Method and compositions for authenticating a product or document |
摘要 |
A method and compositions for authenticating a document or article comprises applying a mixture of a carrier, a leuco dye and an activator to a surface of a document or article, wherein the leuco dye and activator react in response to a rubbing force applied to the surface to change color and wherein the activator is at least one selected from the group consisting of amidophenol, anilides with hydroxyl groups and benzoamides with hydroxyl groups and authenticating the document or article by applying a rubbing force to the surface to effect a color change.
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申请公布号 |
US6114281(A) |
申请公布日期 |
2000.09.05 |
申请号 |
US19980013998 |
申请日期 |
1998.01.27 |
申请人 |
NOCOPI TECHNOLOGIES, INC. |
发明人 |
BELDING, BLAKE QUENTEN;SILKNITTER, JOANN;STEVENSON, KEVIN BRUCE;STOVOLD, TERRY WILLIAM |
分类号 |
B41M5/333;B41M3/14;B41M5/124;B41M5/155;C09D11/00;G03G21/04;(IPC1-7):B41M5/30 |
主分类号 |
B41M5/333 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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