Method of marking solid or liquid substances with nucleic acid for anti-counterfeiting and authentication
US7115301B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2003 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Nov 25, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F3/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of marking a solid article or substance includes the steps of dissolving a water-insoluble medium in a first solvent to form a first mixture, mixing a nucleic acid solution with an intermediate solution to form a second mixture, mixing the second mixture with the first mixture to form a homogenous third mixture, marking the article or substance with the third mixture containing the nucleic acid; and drying the marked article or substance. Through the addition of an intermediate solution, the miscibility between the nucleic acid solution and the medium is increased and a homogenous solution is formed. For marking solid substances or articles, the water-insoluble medium containing known nucleic acid taggants is spread on the target solid substances or articles. For marking liquid, the target liquid is mixed with the water-insoluble media containing known nucleic acid taggants. As a result, the target liquid is labeled with nucleic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.