Process of making roofing material
US4936938A · kind A · utility
14Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2419/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminated roofing material includes an aluminum foil top sheet laminated to a polyethylene film by an ionomer resin. After the sheets are bonded together they are cooled to set the resin and a bitumen coating is applied to the exposed polyethylene sheet and covered with a release paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.