Hydroquinone derivatives as scavengers for oxidized developer
US6458523B1 · kind B1 · utility
0Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2002 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jan 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/34
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New compounds of the formula I are described, whereinn is >1;X is O or NR4;L is a n-valent linking group defined in claim 1 andR1 is H, halogen, C1-C25-alkyl, C3-C25-alkenyl, unsubstituted or by C1-C4-alkyl substituted C5-C8-cycloalkyl;R2 and R3 independently of each other are C1-C4-alkyl, or together with the carbon atom they are bonded to, form a carbocyclic C5-C7 ring, especially C5-C7 cycloalkylene; andm is 1-20, especially 2-4.Compounds of the formula I are active as Dox-scavengers in color photographic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.