Patent search ap:("PERMUTIT CO") AND inv:"EVELYN HOLMES LUCIE" Page 1

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发明授权
Water treatment process and material 失效
Title translation: 水处理工艺和材料

公开(公告)号：US2281194A

公开(公告)日：1942-04-28

申请号：US24764038

申请日：1938-12-24

Applicant: PERMUTIT CO

Inventor： LEIGHTON HOLMES ERIC , EVELYN HOLMES LUCIE , GEORGE PRESCOTT WILLIAM

IPC: B01J41/12 , C08G12/02 , C08G12/08

CPC classification number: C08G12/02 , B01J41/13 , C08G12/08

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