Algae resistant roofing granules with controlled algaecide leaching rates, algae resistant shingles, and process for producing same
US7811630B2 · kind B2 · utility
13Cited by
43References
22Claims
0Family size
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Key dates
| Filing date | Jun 20, 2003 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jun 15, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2443
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Algae-resistant roofing granules are formed by extruding a mixture of mineral particles and a binder to form porous granule bodies, and algaecide is distributed in the pores. Release of the algaecide is controlled by the structure of the granules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.