Pressure-sensitive or heat-sensitive recording material
US4453744A · kind A · utility
10Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Jun 7, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/3336
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pressure-sensitive or heat-sensitive recording material which contains in its color reactant system, as developer for the color former, at least one metal-free compound of the formula ##STR1## wherein R is alkyl of 1 to 12 carbon atoms, cycloalkyl, phenyl, benzyl, or phenyl which is substituted by halogen, nitro, methyl, methoxy, ethoxy or methylenedioxy, and X is hydrogen, halogen, carboxyl, lower alkyl or lower alkoxy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.