Tubular product
US7381454B1 · kind B1 · utility
1Cited by
21References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249993
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tubular product has a tubular base layer, a tubular innermost layer made of plastic by continuous extrusion, and a tubular tie layer of foamed plastic between and adhered to the base layer and the innermost layer. The tie layer is made of melt processable adhesion plastic, is extruded simultaneously with the innermost layer against the base layer, and has better adhesions to the base and innermost layers than the base and innermost layers have to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.