Oxime ethers of 4,4'-bis(N,N-diethylamino)benzhydrol and pressure-sensitive recording systems containing them
US4351956A · kind A · utility
2Cited by
2References
2Claims
0Family size
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Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/914
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Compounds of the formula: ##STR1## wherein R and R.sup.1 are alkyl C.sub.1 -C.sub.4 are useful as color formers for pressure- and heat-sensitive copying materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.