Drain sheet material
US3965686A · kind A · utility
21Cited by
8References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 22, 1975 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Sep 22, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D31/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flexible elongated member is embedded in a coarse non-woven fabric layer. The flexible elongated member has partially opened circumferential portions through which water enters into the flexible member, the circumferential portions and inside thereof forming a continuous drain passage not blocked by deformation of the flexible member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.