Composite beverage coaster
US4978566A · kind A · utility
53Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Jul 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249981
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A reusable, composite coaster for use with a beverage container is characterized by a base substrate of open cell foam material which is heat fusion and pressure bonded to a cover substrate of polymeric fabric material. The open weave of the polymeric fabric material permits moisture to drain into the open cell foam layer, while preventing the buildup of a partial vacuum between the bottom surface of a beverage container and the coaster surface. Moreover, the polymeric fabric cover substrate increases the tear resistance of the assembly, while the open cell foam layer increases the reservoir capacity of the composite assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.