Molded gypsum product and process for preparing the same
US4127628A · kind A · utility
42Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1977 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Apr 19, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B28/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A molded gypsum product comprises a matrix of crystalline gypsum and reinforcing fibers of glass fiber and asbestos fiber uniformly distributed in said matrix in a multi-layer structure having at least one higher density layer and at least one lower density layer which is continuously adjacent to said higher density layer and having an average apparent bulk density of 0.3 to 0.9 g/cc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.