Security paper
US7041364B2 · kind B2 · utility
3Cited by
2References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Jan 20, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to security paper (1) including at least one zone (2; 3) that reacts with nonpolar solvents. The paper also includes a barrier (4) that is impermeable to nonpolar solvents between a first outside face (10) of the security paper and the zone (2; 3) that reacts with the solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.