| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 07.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Compn which develops color when heated & extinguishes color upon cooling - Electron-donating color-developing compd - Electron-accepting alkoxy phenol: HO-C6H4-OC3H7 - Reaction medium |
| PATENT PHOTOCOPY | Available on request |
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