Coated metal fastener and method for making same
US5178903A · kind A · utility
21Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1990 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Jul 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/903
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A metal fastener, suitable for use in connection with wood construction and coated with a polymeric residue produced by removing water from an aqueous dispersion of a film-forming, thermoplastic, predominantly aliphatic polyurethane resin, so as to thereby reduce penetration force, increase withdrawal force, and protect against corrosion, is disclosed. 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.