Coated metal fastener
US4964774A · kind A · utility
26Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Sep 29, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/903
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A metal fastener, suitable for use in wood construction and coated with a polymeric residue produced by removing water from an aqueous dispersion of a film-forming, thermoplastic, predominately aliphatic polyurethane resin, thereby to reduce penetration force, increase withdrawal force, and protect against corrosion. Before the polyurethane coating is applied, a zinc layer is applied so as to coat the fastener, and a chromate conversion layer is applied so as to coat the zinc layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.