Aluminium workpiece
US6368483B1 · kind B1 · utility
3Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jan 18, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An aluminum workpiece, e.g. sheet for containerstock, having an anodic oxide film whose thickness varies from location to location on the surface, whereby interference contrast effects are visible on the surface. Aluminum foil having on a surface thereof an unsealed anodic oxide film 5-1000 nm thick which provides a clean surface with fretting resistance. A method of anodizing thin aluminum foil is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.