IMPROVEMENTS IN OR RELATING TO THE MANUFACTURE OF NATURAL CHALK WHITING,申请号GB19680036138-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO THE MANUFACTURE OF NATURAL CHALK WHITING
摘要
申请公布号	GB1279095(A)	申请公布日期	1972.06.21
申请号	GB19680036138	申请日期	1968.07.29
申请人	WELWYN HALL RESEARCH ASSOCIATION	发明人	RICHARD ROBERTSON DAVIDSON
分类号	C01F11/18;C09C1/02	主分类号	C01F11/18
代理机构		代理人
主权项
地址

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