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公开(公告)号：US2904184A
公开(公告)日：1959-09-15
申请号：US66918557
申请日：1957-07-01
Applicant: PUROLATOR PRODUCTS INC
Inventor： DALEY JAMES J , TULL VERNON M
IPC: B01D29/21
CPC classification number: B01D29/21 , B01D29/52 , B01D2201/0438 , B01D2201/0453 , B01D2201/34
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