High density polyurethane and polyisocyanurate construction boards and composite boards
US7972688B2 · kind B2 · utility
20Cited by
32References
36Claims
0Family size
Inventors
Key dates
| Filing date | Jan 30, 2006 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Oct 15, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249992
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A covered low-slope or flat roof comprising (a) a roof deck, (b) an optional insulation board including a polyurethane or polyisocyanurate cellular structure having a density that is less than 2.5 pounds per cubic foot, (c) a coverboard including a polyurethane or polyisocyanurate cellular structure having a density greater than about 2.5 pounds per cubic foot, and (d) a membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.