Controlled time-release algae resistant roofing system
US9243409B2 · kind B2 · utility
3Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2014 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Aug 26, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31815
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Time-release algae-resistant roofing granules have a base particle including an algaecide and an outer coating layer including another algaecide. The at least two algaecides are released over different predetermined periods. The outer layer protects the base particle from exposure to the environment for a predetermined period, then fails catastrophically so that the interior algaecide can be released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.