Tetra-aza indene compounds
US4728601A · kind A · utility
13Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Apr 1, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/166
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Tetra-aza indene compounds of the formula ##STR1## wherein R.sub.1 is alkyl or a ring system and R.sub.2 and R.sub.3 are hydrogen or alkyl. These compounds are of use as image toners in photographic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.