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发明名称
Method of removing bleachable pigments from paper containing ligno-cellulosic constituents
摘要
申请公布号
US1992977(A)
申请公布日期
1935.03.05
申请号
US19330653672
申请日期
1933.01.26
申请人
LEWIS L. ALSTED
发明人
WELLS SIDNEY D.
分类号
D21C5/02
主分类号
D21C5/02
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代理人
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