Filter apparatus with fluid bypass

Details Filter apparatus with fluid bypass Filter apparatus with fluid bypass

2006-06-19

2008-08-26

Prince, Fred (Department: 1797)

Liquid purification or separation

Structural installation

Closed circulating system

C210S416200, C119S259000

Reexamination Certificate

active

07416659

ABSTRACT:
A filter arrangement for filtration of a primary fluid, the filter arrangement having a filtration region and a bypass region. The bypass region is a sealed region containing a secondary fluid having a specific gravity different than a specific gravity of the primary fluid. The bypass region providing a bypass pathway for flow of the primary fluid during extended use of a clogged filter cartridge.

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Exhibt A Doctors Foster & Smith,Aquarium Outfitters, 4 pgs, (Date: Admitted Prior Art), exact date unknown.
Exhibt B Instructions 2206, 8 pgs, (Date: Admitted Prior Art), exact date unknown.
Exhibit C Marineland®,Instructions Duetto Mini Submersible Power Filter, 1 pg, (Date: Admitted Prior Art), exact date unknown.
Exhibit D Marineland,Duetto 50 Submersible Power Filter, 10 pgs, (Date: Admitted Prior Art), exact date unknown.
Exhibit E Zoo Med,Micro Clean 304 Internal Mini-Filter, 8 pgs, (Date: Admitted Prior Art), exact date unknown.
Exhibit F hydor®,Thermofilter EKIP 250, 7 pgs., (Date: Admitted Prior Art), exact date unknown.
Exhibit G Tetratec® 200-400 1/h,Komfort Aquarium Innenfilter IN400 plus, 4 pgs., (Date: Admitted Prior Art), exact date unknown.
Exhibit H FLUVAL®,Underwater Filter Iplus, 4 pgs., (Date: Admitted Prior Art), exact date unknown.
Exhibit I hydor®,Filter ITPF 3, 4 pgs., (Date: Admitted Prior Art), exact date unknown.

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