Asphalt impregnated felt building materials
US4079158A · kind A · utility
25Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1975 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Oct 7, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2762
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The disclosure describes asphalt saturated felt building materials, optionally having a mineral filled asphalt base coating thereon, in which the asphalt saturating the felt and/or the asphalt in any mineral filled coating is a blend of 10-55% sulfur dispersed in the asphalt. The materials are used in the conventional manner as roofing felt, roofing shingles, and in built-up roofing, to obtain improved fire resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.