Filter medium, fluid filter, and engine oil filter

Details Filter medium, fluid filter, and engine oil filter Filter medium, fluid filter, and engine oil filter

2011-08-02

2011-08-02

Kim, John (Department: 1777)

Liquid purification or separation

Filter

Material

C210S483000, C210S488000, C210S489000, C210S491000, C210S496000, C210S504000, C210S505000, C210S508000

Reexamination Certificate

active

07987996

ABSTRACT:
A filter medium comprises a modified cross-section fiber (A) having a fiber diameter between 40 and 70 μm, an extremely fine fiber (B) having a fiber diameter of more than 5 μm and no more than 10 μm and a modified cross-section fiber (C) having a fiber diameter between 15 and 30 μm, the content of the extremely fine fiber (B) is between 3 and 10% by mass, and the content of the modified cross-section fiber (C) is between 5 and 15% by mass based on 100% by mass of total the fibers in the filter medium.

REFERENCES:
patent: 5057368 (1991-10-01), Largman et al.
patent: 7314497 (2008-01-01), Kahlbaugh et al.
patent: 2008/0141637 (2008-06-01), Hirata et al.
patent: 2008/0148699 (2008-06-01), Sazawa et al.
patent: 2008/0156720 (2008-07-01), Ohashi
patent: 5-49825 (1993-03-01), None
patent: 9-841 (1997-01-01), None
patent: 9-29021 (1997-02-01), None
patent: 2000-93718 (2000-04-01), None
patent: 2002-129433 (2002-05-01), None
patent: 2007-167788 (2007-07-01), None
English language Abstract of JP 9-841, Jan. 7, 1997.
English language Abstract of JP 5-49825, Mar. 2, 1993.
English language Abstract of JP 2007-167788, Jul. 5, 2007.
English language Abstract of JP 9-29021, Feb. 4, 1997.
English language Abstract of JP 2000-93718, Apr. 4, 2000.
English language Abstract of JP 2002-129433, May 9, 2002.

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