Durable porous article of manufacture and a process to create same
US6443258B1 · kind B1 · utility
79Cited by
20References
60Claims
0Family size
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Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Sep 15, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B2001/8461
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An acoustically absorbent porous panel formed from a cured aqueous foamed cementitious material comprising on a wet basis of about 53% to about 68% by weight cement, about 17% to about 48% by weight water, about 0.05% to about 5% by weight fiber, and about 0.01% to about 10% by weight surfactant. The panel also has pores distributed within the cured material comprising about 75% to about 95% by volume of the material. The cement-based, foamed panel provides good acoustical performance with enhanced durability and moisture resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.