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发明名称
COATED MICROSPHERES AND THEIR USES
摘要
The invention relates to microspheres coated with a phenolic novolak resin, a process for preparing them, and their use in making foundry shapes, e.g. molds, cores, sleeves, pouring cups, etc., which are used in casting metal parts.
申请公布号
US2010099794(A1)
申请公布日期
2010.04.22
申请号
US20090641935
申请日期
2009.12.18
申请人
AUFDERHEIDE RONALD C
发明人
AUFDERHEIDE RONALD C.
分类号
B22C1/22;B22C9/00
主分类号
B22C1/22
代理机构
代理人
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