Process for recovering waste clays,申请号US19270159236-传众专利搜索

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发明名称	Process for recovering waste clays
摘要
申请公布号	US1782744(A)	申请公布日期	1930.11.25
申请号	US19270159236	申请日期	1927.01.05
申请人	RICHFIELD OIL COMPANY OF CALIFORNIA	发明人	RIAL WIRT D.;BARRATT WHITFORD R.
分类号	B01J20/12	主分类号	B01J20/12
代理机构		代理人
主权项
地址

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