Crystalline fluoran compound
US6071853A · kind A · utility
4Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B11/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are a novel crystal form of the fluoran compound represented by formula (I) as characterised by specific X-ray powder diffraction pattern and melting range; process for the preparation of said novel crystal form and recording materials comprising the said crystal form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.