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公开(公告)号：US1773275A
公开(公告)日：1930-08-19
申请号：US10307926
申请日：1926-04-19
Applicant: GRIFFIN WATKINS
Inventor： SPENCER NEELEY GEORGE
IPC: C02F1/48
CPC classification number: C02F1/485 , C02F2201/483 , C02F2303/22
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公开(公告)号：US1773274A
公开(公告)日：1930-08-19
申请号：US7054425
申请日：1925-11-21
Applicant: GRIFFIN WATKINS
Inventor： SPENCER NEELEY GEORGE
CPC classification number: C02F1/4602 , C02F2201/46125 , C02F2303/22 , C23F13/10
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