Upgrade of below grade fill to at grade fill
US5983916A · kind A · utility
1Cited by
2References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7021
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method of upgrading a below grade fill to prevent accidental release harmful materials from contaminating the soil below grade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.