Composition for the delocalized marking of articles, its preparation and use
US5670239A · kind A · utility
11Cited by
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19Claims
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Inventor
Key dates
| Filing date | Oct 27, 1995 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Oct 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A composition for the delocalized marking of articles, which makes the forging or improper use or exploitation of these articles difficult. It includes chemical elements having a K.sub..alpha. line of from 3.69 keV to 76.315 keV in defined distributions, the physical properties of these substances and/or their elemental and/or quantitative composition serving as delocalized information which cannot be discerned with the naked eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.