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发明名称
Asphalt and process for producing the same
摘要
申请公布号
US2277842(A)
申请公布日期
1942.03.31
申请号
US19380194174
申请日期
1938.03.05
申请人
UNION OIL COMPANY OF CALIFORNIA
发明人
BRAY ULRIC B.
分类号
C10C3/04
主分类号
C10C3/04
代理机构
代理人
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地址
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