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公开(公告)号：US3214018A
公开(公告)日：1965-10-26
申请号：US22921462
申请日：1962-10-08
Applicant: FELDSPAR CORP
Inventor： NEAL JOHN P
CPC classification number: B03D1/01 , B03D1/002 , B03D1/006 , B03D1/012 , B03D2201/02 , B03D2201/04 , B03D2201/06 , B03D2203/04
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