Toy using water reactive paper
US5163846A · kind A · utility
38Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43M11/08
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A toy has a frame with a display area for receiving a water reactive paper. The paper has a brightly colored substrate covered by a surface layer of silica and resin which becomes transparent when wet and opaque when dry so that the bright color does or does not show through depending upon whether the surface is wet or dry. Thus, the paper appears to have disappearing ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.