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公开(公告)号：US2613813A
公开(公告)日：1952-10-14
申请号：US14096250
申请日：1950-01-27
Applicant: FRAM CORP
Inventor： RODMAN CLARKE A , TEWKSBURY NORMAN L
IPC: C10G31/09
CPC classification number: C10G31/09
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公开(公告)号：US2609931A
公开(公告)日：1952-09-09
申请号：US2176448
申请日：1948-04-17
Applicant: FRAM CORP
Inventor： RODMAN CLARKE A , TEWKSBURY NORMAN L
IPC: B01D15/00 , B01D15/04 , B01D37/00 , C10M175/00
CPC classification number: C10M175/0016 , B01D15/00 , B01D37/00 , B01D37/02
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