Security paper for currency and banknotes
US4652015A · kind A · utility
102Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Dec 5, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/916
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Security devices in the form of metalized plastic films are incorporated within a security paper such as banknotes and other valuable documents during the papermaking process for viewing solely by means of transmitted light. The devices comprise printing of extreme fine line clarity and high opacity such that legibility is possible by means of transmitted light while remaining completely indiscernable under reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.