Gold colored laminated composite material having magnetic properties
US4292377A · kind A · utility
44Cited by
14References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1980 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jan 25, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12951
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A novel laminated composite material of gold-colored appearance especially suited for, but not limited to, coinage applications has a ferromagnetic core located between sheathing layers of a Cu-Al or Cu-Ni-Al alloy and separated therefrom by layers of copper. Alternative methods involving hot and/or cold rolling techniques are provided for the production of the novel laminates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.