Moulded panel and the method of its manufacture
US4042751A · kind A · utility
10Cited by
5References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jan 6, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Jan 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31554
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
At least one polyurethane cellular support sheet is impregnated in different zones with one or more polymerizable polyurethane mixtures and then molded while polymerization occurs to produce a shaped panel with zones or portions of different stiffness, and with or without one or more cover materials or inserts or fastening elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.