Writing screen
US4746576A · kind A · utility
21Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Dec 23, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing screen comprising a substrate and an overlayer on the surface thereof of a film comprising a vinylidene fluoride copolymer resin having a ratio of the existing amount of fluorine atoms (F) and that of carbon atoms (C), F/C, on the surface in the range of 0.6 to 1.5. The screen has excellent marker suitability and resistance to surface damage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.