发明名称 |
Heterocyclic pigments and dyes |
摘要 |
A compound of formula I <IMAGE> in which each R1 independently is selected from oxygen, =NH or =N-R2 where R2 is an aromatic or heteroaromatic group, provided not more than two groups R1 are selected from oxygen and =NH.
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申请公布号 |
US5021573(A) |
申请公布日期 |
1991.06.04 |
申请号 |
US19890340348 |
申请日期 |
1989.04.19 |
申请人 |
SANDOZ LTD. |
发明人 |
BITTERLI, PETER;KAUH, BANSI L. |
分类号 |
C08K5/3412;C08K5/3417;C09B57/00;C09B57/08 |
主分类号 |
C08K5/3412 |
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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