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公开(公告)号：US1755502A
公开(公告)日：1930-04-22
申请号：US23404327
申请日：1927-11-17
Applicant: SILICA PRODUCTS CO
Inventor： ARTHUR COLLINGS WILLIAM
CPC classification number: C04B14/104 , C04B28/04 , Y10S106/04 , C04B14/022 , C04B14/10 , C04B22/00 , C04B22/062 , C04B22/124 , C04B22/14 , C04B20/02
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