Thin film structure having magnetic and color shifting properties
US4838648A · kind A · utility
211Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1988 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | May 3, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/902
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Thin film structure having magnetic properties and optically variable properties comprising a substrate and a multilayer interference coating carried by the substrate producing an inherent color shift with angle. The interference coating has a metal-dielectric design which includes a metal which has magnetic as well as reflective properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.