Ferric oxide and its preparation,申请号US19380246381-传众专利搜索

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发明名称	Ferric oxide and its preparation
摘要
申请公布号	US2330553(A)	申请公布日期	1943.09.28
申请号	US19380246381	申请日期	1938.12.17
申请人	BUTLER BENJAMIN F	发明人	BUTLER BENJAMIN F.
分类号	C01G49/06	主分类号	C01G49/06
代理机构		代理人
主权项
地址

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