Color-change laminates and toy sets with the use thereof
US6416853B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1999 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Jan 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2148
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A color-change laminate comprising a substrate and formed thereon a porous layer which comprises a low-refractive-index pigment dispersed in a binder resin and tenaciously adherent thereto is disclosed. The porous layer becomes transparent or translucent upon absorption of a liquid medium, e.g., water to give a variety of visual changes. The low-refractive-index pigment contains at least a finely particulate silicic acid produced by the wet process. Toy sets consisting of the above color-change laminates with dolls or toy animals and toy sets consisting of the above color-change laminates with a means of water adhesion are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.