Roofing products with zones of algae-resistant granules and method of manufacture
US11713579B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2021 |
| Grant date | Aug 1, 2023 |
| Priority date | — |
| Expiry date | Sep 13, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D2001/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure relates generally to roofing products, for example, suitable for use covering and protecting the roofs of structures. The present disclosure relates more particularly to a roofing product including an upper section and an exposed section. The roofing product includes a substrate having a top surface and a bottom surface, and a plurality of zones of roofing granules disposed on the top surface of the substrate. The plurality of zones includes first, second and third zones within the exposed section. The first zone includes a first collection of algae-resistant roofing granules and has a first algae-resistance intensity. The second zone includes a second collection of algae-resistant roofing granules and has a second algae-resistance intensity. The third zone has a third algae-resistance intensity that is different from the first algae-resistance intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.