Bulletin board
US4721644A · kind A · utility
11Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1986 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Sep 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2395
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A bendable and shipable bulletin board comprising front and rear layers heat sealed to one another, a foam core between the front and rear layers, and at least one stiffening layer between the front and rear layers. Advantageously the front layer is sueded so pin holes will not show and the foam and stiffening layers, possibly integral, can be folded over for shipping but, upon release, will resume their flat condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.