Pipes base on polyolefin resin for manufacturing pipelines and couplings for assembling them
US4927184A · kind A · utility
52Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1988 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Feb 19, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/246
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Pipes and couplings for manufacturing pipelines comprising a wall having at least one layer of core material consisting essentially of a crosslinked polyolefin resin and at least one layer of surface material consisting essentially of a thermoplastic resin, said core material being crosslinked to a rate higher than 30%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.