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发明名称
THRESHOLD COMPOSITIONS AND METHODS
摘要
申请公布号
US3451939(A)
申请公布日期
1969.06.24
申请号
USD3451939
申请日期
1966.04.13
申请人
CALGON CORP.
发明人
PAUL H. RALSTON
分类号
C02F5/14;(IPC1-7):C02B5/00
主分类号
C02F5/14
代理机构
代理人
主权项
地址
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