Drainage device
US7891907B2 · kind B2 · utility
6Cited by
12References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 2005 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Dec 11, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F5/0401
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Drainage device having an inlet having at least three substantially straight sides with rounded corners linking the at least three substantially straight sides. The sides and corners taper to form a circular outlet. The rounded corners are upper edges of channels of the device, and the channels are depressions in the sides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.