Patent search ap:("RODERICK M WILLIS" OR "CHARLES L OLDFATHER") AND inv:"WILLIS RODERICK M" Page 1

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发明授权
Water treatment process for improved gravity filtering and backwashing 失效
Title translation: 改进重力过滤和回水的水处理工艺

公开(公告)号：US3506125A

公开(公告)日：1970-04-14

申请号：US3506125D

申请日：1967-09-15

Applicant: RODERICK M WILLIS , CHARLES L OLDFATHER

Inventor： WILLIS RODERICK M , OLDFATHER CHARLES L

IPC: B01D24/46 , C02F1/00 , C02F1/24 , C02F1/64 , B01D37/00

CPC classification number: C02F1/645 , B01D24/22 , B01D24/4631 , B01D2201/087 , C02F1/001 , C02F1/24

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