Filter element

Details Filter element Filter element

2006-11-21

2006-11-21

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C210S496000, C210S504000, C210S505000, C442S400000, C442S412000

Reexamination Certificate

active

07137510

ABSTRACT:
A filter element in which several layers (2, 3, 5, 7, 8) made of a filtering medium are joined contiguously in the direction of flow with at least one layer (2, 7) made of a filtering medium with a high storage capacity and a low degree of separation being arranged on the in-flow side and at least one layer (3, 8) made of a filtering medium with a low storage capacity and a high degree of separation being arranged on the out-flow side. Preferably the in-flow filtering medium is made of a filter paper containing cellulose or of a melt-blown material, and the out-flow side filtering medium is produced from a filter paper containing cellulose.

REFERENCES:
patent: 4033881 (1977-07-01), Pall
patent: 4604203 (1986-08-01), Kyle
patent: 4824451 (1989-04-01), Vogt et al.
patent: 4910064 (1990-03-01), Sabee
patent: 4925601 (1990-05-01), Vogt et al.
patent: 4976858 (1990-12-01), Kadoya
patent: 5437910 (1995-08-01), Raabe et al.
patent: 6077391 (2000-06-01), Girondi
patent: 60677 (1982-09-01), None
patent: 338479 (1989-10-01), None
patent: 338479 (1989-10-01), None
patent: 63278517 (1988-11-01), None
patent: 6-198108 (1994-07-01), None
English language Machine translation from the Japanese Patent office of JP 06-198,108 A, 1.64 pages.
English language abstract from Derwent for EP 338,479 A, 3 pages.
English language Translation of EP 338479 A (Klimmek et al) Oct. 25, 1998.
English language translation of JP 06-198108.

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