Concrete column form
US4767095A · kind A · utility
18Cited by
8References
10Claims
0Family size
Inventors
Key dates
| Filing date | Oct 19, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Oct 19, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G13/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lightweight, concrete form having an inner elongate cylindrical member with an internal opening having a cross section to provide the desired shape for a concrete column and a layer of thin stretch film stretched about the inner member to place the inner member in compression and with the ends of the film overlapped for self-adherence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.