Drainage beads
US8672584B2 · kind B2 · utility
2Cited by
59References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2011 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Mar 8, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Polystyrene drainage beads having optimized shapes to provide increased specific gravity and void volume at a given bulk density. Expanded forms of such drainage beads may be used as a geosynthetic aggregate in pre-assembled drainage units. Such pre-assembled drainage units may be used as foundation drains, septic drainage fields, or for other applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.