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公开(公告)号:US1421978A
公开(公告)日:1922-07-04
申请号:US38866320
申请日:1920-06-12
Applicant: NEWTON D BAKER
Inventor: MILLIGAN LOWELL H
IPC: C01G28/00
CPC classification number: C01G28/007
公开(公告)号:US1421978A
公开(公告)日:1922-07-04
申请号:US38866320
申请日:1920-06-12
Applicant: NEWTON D BAKER
Inventor: MILLIGAN LOWELL H
IPC: C01G28/00
CPC classification number: C01G28/007