Plastics pipe
US6016849A · kind A · utility
4Cited by
12References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Oct 22, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic pipe which includes an inner core and an outer protective layer bonded thereto, in which the dimensions of the pipe and the protective layer are such that the ratio of the external diameter of the pipe to the thickness of the protective layer is at least 70, preferably at least 100, and the cohesive strength of the outer protective layer, excluding any lines of weakness, at least at the ends of the pipe is greater than the peel strength of the adhesive bond between the outer protective layer and the inner core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.