Recording sheet and color developer therefor
US3934070A · kind A · utility
25Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1973 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Oct 16, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/28
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A color developer is disclosed which, when contacted with a color former, is capable of forming a distinct color, the color developer comprising a metallic compound of an aromatic carboxylic acid. Suitable metals are, for example, those of the following groups of the Periodic Table: Ib, IIa, IIIb, IVb, VIa, VIIa and VIII. A recording sheet employing the color developer is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.