Lightweight construction materials and articles made thereof
US3940811A · kind A · utility
91Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1973 |
| Grant date | Mar 2, 1976 |
| Priority date | — |
| Expiry date | Jul 16, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249981
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Lightweight construction materials having a low heat shrinking percentage and a high moisture permeability obtained by forming complementary concavoconvex patterns by means of press molding on both surfaces of a sheet of a foamed polyethylene type resin containing a relatively large amount of inorganic calcic filler, cushion made of said construction materials and mattress manufactured by laminating sheets of soft polyurethane foam on the lightweight construction material as core and covering the whole with cloth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.