Metal articles with smooth surface having durable visible marking and method of manufacture
US6896787B2 · kind B2 · utility
1Cited by
1References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2002 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Jul 9, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Metal articles having a durable visible marking on a smooth Type III hard anodized surface particularly useful for shock absorber tubes are produced by applying an alkaline solution to the anodized surface for not less than about 15 seconds at temperature of 100°-140° F.; applying a pattern of lacquer based solvent ink to said surface; and sealing the applied pattern by applying a liquid selected from the group consisting of nickel acetate, cobalt acetate and boiling water to said pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.