Corrugated polymeric zigzag sheet for greenhouse roof structures
US6959519B2 · kind B2 · utility
27Cited by
23References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Mar 28, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sheet structure includes a pair of corrugated sheets formed in a zigzag pattern, the pair comprising an upper sheet and a lower sheet. In an exemplary embodiment, each of the pair of corrugated sheets further includes a flat portion disposed at selected intervals between individual zigzags. The flat portions of the upper sheet are aligned with corresponding flat portions of the lower sheet so as to maintain the upper and lower sheets in a double wall configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.