发明授权
US6140033A Photographic element 失效
摄影元素

Photographic element
摘要:
A photographic element comprises novel pyrazolo[5,1-c]-1,2,4-triazole dye forming couplers, the couplers and azomethine dyes. The couplers are represented by the following structure: ##STR1## wherein: Z represents the elements of C, N, O, or S necessary to complete a substituted or unsubstituted heterocyclic 5 or 6 member ring along with nitrogen;R.sub.1 represents a substituent group;and, X represents a hydrogen or a coupling off group.
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