Novel compounds, processes and marking systems
US4257954A · kind A · utility
30Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1979 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Jun 14, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Mono and bis substituted (arylsulfonyl)alkanes useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of the appropriate aldehyde or dialdehyde with the appropriate aryl or heterocyclic moiety and the appropriate phenylsulfinic acid in the presence of a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.