Method of refining rosin,申请号US19300432253-传众专利搜索

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发明名称	Method of refining rosin
摘要
申请公布号	US1890086(A)	申请公布日期	1932.12.06
申请号	US19300432253	申请日期	1930.02.28
申请人	HERCULES POWDER COMPANY	发明人	HUMPHREY IRVIN W.
分类号	C09F1/00	主分类号	C09F1/00
代理机构		代理人
主权项
地址

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