Acid copper chromate concentrates
US4323477A · kind A · utility
6Cited by
4References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1979 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Oct 3, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27K3/52
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An aqueous copper chromate concentrate substantially free of sulfate anions is provided which can be diluted for use as a wood preservative. The concentrate is formed of a hexavalent chromium compound, a bivalent copper compound, and an acid selected from nitric, sulfamic, fluosilicic, fluoboric and mixtures wherein the total oxide content of CuO and CrO.sub.3 is from 25 to 60%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.