Micronized wood preservative formulations comprising copper and zinc
US7632567B1 · kind B1 · utility
13Cited by
63References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Sep 29, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31989
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Use of micronized zinc compounds in wood preservation treatments containing micronized copper compounds significantly increases the efficacy of the treatment with respect to that of the copper compounds alone. Micronized copper compounds used at a retention in the range of from 0.005 to 1 pounds per cubic foot (pcf) expressed as CuO equivalent, and zinc compounds are used at a retention in the range of from 0.005 to 1 pcf expressed as ZnO equivalent, the increase in wood preservation efficacy over similar retentions of copper compounds alone can be seen in as little as 24 months.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.