发明名称 |
Carbonless duplicating systems |
摘要 |
Substituted furopyridinones and furopyrazinones which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting diphenylamines with substituted benzoyl (or 3-indolylcarbonyl)pyridinecarboxylic acids and substituted benzoyl (or 3-indolylcarbonyl)pyrazinecarboxylic acids, respectively.
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申请公布号 |
US4243250(A) |
申请公布日期 |
1981.01.06 |
申请号 |
US19790048534 |
申请日期 |
1979.06.14 |
申请人 |
STERLING DRUG INC. |
发明人 |
SCHMIDT, PAUL J.;HUNG, WILLIAM M. |
分类号 |
B41M5/145;B41M5/327;C07D213/79;C07D213/80;C07D491/04;(IPC1-7):B41M5/16;B41M5/18;B41M5/22 |
主分类号 |
B41M5/145 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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