Monolithic asphalt surface with shielding edges
US6769837B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jun 4, 2003 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jun 4, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C3/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of forming a shielded asphalt surface on a prepared subgrade for a roadway, or the like, to prevent water infiltration, freeze-thaw cycles, and roots from damaging the surface. The method involves forming a recess along the outer edges of the subgrade; depositing asphalt into the recess and compacting the deposited asphalt to form an edge portion at about the same height as the subgrade; depositing asphalt onto the subgrade to form the roadway surface and also onto the edge portion; compacting the deposited asphalt thereby integrating the asphalt that forms the roadway surface with the asphalt that forms the edge portion to provide a monolithic shielded asphalt surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.