Algae resistant roofing granules with controlled algaecide leaching rates, algae resistant shingles and process for producing same
US8668954B2 · kind B2 · utility
14Cited by
87References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2010 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Sep 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2443
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Algae-resistant roofing shingles are formed by extruding a mixture of mineral particles and a binder to form porous granule bodies, and algaecide is distributed in the pores to provide alqae-resistant granules, which are subsequently applied to roofing shingles. Release of the algaecide is controlled by the structure of the granules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.