Trim board
US5693409A · kind A · utility
4Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Oct 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31989
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A fiber-cement trim board is formed by a fiber-cement core layer faced with a pair of fiber-cement surface layers of substantially equal thickness in the core layer and have a cement-to-wood ratio by weight of between 2 and 3.5 and at least 70% of the wood strands have a length longer than 10 min. Each of the surface layers is formed of a fiber-cement mixture containing wood strands, at least 80% of which have a length of less than 4 mm and a cement-to-wood ratio by weight of between 2 and 3.5. The board is covered at least on the two main faces by a water barrier coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.