Optical fingerprinting of plastics compositions
US6091491A · kind A · utility
6Cited by
6References
9Claims
0Family size
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Key dates
| Filing date | Jul 20, 1998 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Jul 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A plastics material which contains a pigment composition comprising a pigment having adsorbed on its surface, or as a physical mixture, up to 10% by weight, based on the total weight of pigment composition of a coding compound which is a compound containing azo, azomethine or polycyclic chromophore and which has an absorption spectrum and a Raman spectrum different from that of the pigment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.