Process for coloring wood with iron salt in water
US4752297A · kind A · utility
9Cited by
5References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1987 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Feb 26, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27K5/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for coloring wood whereby the resulting color will not change or substantially fade upon exposure to long term environmental weathering, which process comprises contacting the wood with an aqueous solution containing 0.01%-10% of an iron salt derived from a mono-, di-, or tri-carboxylic acid or a mono-, di-, or tri-carboxylic hydroxy acid containing 1-6 carbon atoms. The iron salt solution of this invention may be used to color nontreated wood as well as wood treated with known preservative compositions containing one or more heavy metals including copper, chromium, arsenic and zinc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.