Foam plastics sheet materials
US4234641A · kind A · utility
11Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1979 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Jul 10, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249981
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Foam plastics sheet material, such as a wallcovering, has graduated color toning. The material comprises a substrate web having a pigmented base coat and a foam coat in which the pigment has migrated to the surface of the foam coat in varying degrees, or, in some areas, not at all. The foam coat can have at least two thicknesses or can be applied to a pre-embossed substrate web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.