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公开(公告)号：US3532490A
公开(公告)日：1970-10-06
申请号：US3532490D
申请日：1968-01-18
Applicant: NAT RES DEV
Inventor： BURKIN ALFRED RICHARD
IPC: C22B23/00 , B01D11/04 , B22F9/24 , B22F9/26 , C22B3/00 , C22B3/26 , C22B15/00 , C22B15/12 , B22F9/00 , C22B23/04
CPC classification number: B22F9/26 , C22B3/0005 , Y02P10/234
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