| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 06.99 |
| PATENT ASSIGNEE | Standard Register Co |
| PATENT CLAIMS |
- Providing substrate with first & second surfaces - Coating one surface with compn activatable to produce a color, said compn comprising an initially colorless color former & color developer & including an insulating material which prevents heat transfer from a laser printer to compn preventing premature melting of compn - Printing substrate using laser printer - Exposing substrate to solvent, heat at 400F for > 1 sec or abrasion such that compn is activated to form a color |
| PATENT PHOTOCOPY | Available on request |
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