Method for marking items for identification
US6432715B1 · kind B1 · utility
41Cited by
30References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for marking or tagging individual microparticles using a near infrared fluorophore for identification is provided. The near infrared fluorophore is included with one or more layers comprising the microparticle. Desirably, the coating layers contain colorants such as dyes and/or pigments which increases the total possible combinations that may be used to identify the marked material. There is further provided a method for marking a material using these microparticles containing a near infrared fluorophore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.