Roofing products including mixtures of algae-resistant roofing granules
US9334654B2 · kind B2 · utility
3Cited by
51References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2006 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Feb 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Roofing granule mixtures include multiple classes of algae-resistant granules, with each class of algae-resistant granules including at least one algaecide. One class of granules provides immediate algae resistance, while release of algaecide from other granules is delayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.