Dual density filter cartridge

Details Dual density filter cartridge Dual density filter cartridge

2006-06-13

2006-06-13

Prince, Fred G. (Department: 1724)

Liquid purification or separation

Structural installation

Closed circulating system

C210S232000, C210S282000, C210S283000, C210S416200, C210S486000, C210S489000, C210S150000, C210S615000, C210S631000, C210S484000, C119S260000

Reexamination Certificate

active

07060181

ABSTRACT:
The invention relates to aquarium filters providing improved water filtration without accelerated clogging. The present invention also relates to methods of using such filters.

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Exhibit B, Penn-Plax® CascadeTM 200 Power Filter, 8 pgs. Date Unknown.
Exhibit D, “Renaissance Bravo 120/200/300 Power Filter System, Instructions and Warranty,”hydor®, 6 pages (Date: publicly known prior to Nov. 7, 2001).
Exhibit A1, “External Self-Priming Power Filter PRIME10,”hydor®, 4 pgs (Date: publicly known prior to Nov. 7, 2001).
Exhibit A2, “Renaissance PRIME® 10/20/30 Self-Priming Canister Filters, Instructions & Warranty” 4 pgs (Date: publicly known prior to Nov. 7, 2001).
Exhibit C, “Second Nature Whisper Triad Power Filters,”Tetra/Second nature, 2 pages (1995).

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