Sheet type roofing
US4472243A · kind A · utility
48Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1984 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Apr 2, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sheet type felt material and sheet type roofing material such as shingles and rolls made therefrom. The felt comprises 10-60 wt % glass fibers of varying lengths, 15-80 wt % cellulosic fiber and 5-25% binder. The roofing material is felt of the invention saturated with asphaltic saturant and coated with filled asphaltic coating material and conventional roofing granules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.