Manhole cover
US8540454B2 · kind B2 · utility
5Cited by
8References
17Claims
0Family size
Inventor
Key dates
| Filing date | Dec 29, 2009 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D29/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A manhole cover which has an upper body and a lower body coupled to each other to maintain balance, to endure loads applied from an external source in a stable manner, to protect the inside of the manhole from the ingress of rainwater, and to enable the upper body to be stably fixed inside the lower body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.