Purifying of earthy minerals,申请号US19360098338-传众专利搜索

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发明名称	Purifying of earthy minerals
摘要
申请公布号	US2251256(A)	申请公布日期	1941.07.29
申请号	US19360098338	申请日期	1936.08.28
申请人	WILLIAM FELDENHEIMER	发明人	FELDENHEIMER WILLIAM
分类号	C04B33/10;C09C1/42	主分类号	C04B33/10
代理机构		代理人
主权项
地址

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