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US4657672A Expired / Lapsed US ⏱️ 0.0 years remaining

Immersion type water filter

Assignee: Individual
•
Filing: 1985-06-03
•
Granted: 1987-04-14
•
Expires: 2005-06-03
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Abstract

Abstract An enclosed filter is disclosed herein having an elongated container or housing composed of transparent material incorporating a plurality of adjacent filtering chambers separated by a mesh partition or grid. Filter material especially suited for removing chloramine occupies each chamber and pump apparatus is employed for drawing water through an open grid end of the housing through the chambers for existing via a discharge port in the pump apparatus.

Inventors

  • 👤 Raymond A. Allen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 20:56
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045; C; C02; C02F; C02F1/00; C02F1/72; C02F1/76

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 176 words
In an out-of-doors aquarium or pond for holding and displaying live fish and plants, the combination which comprises: an immersion filter submerged in the body of water intended to be filtered; said filter including a housing of transparent composition having a mesh grid at one end and a pump means at its other end; said filter further including a plurality of chambers including a middle chamber between the opposite ends of said housing separated by meshed partitions so as to allow water flow through said housing from said grid at one end to said pumping means; water filtering material occupied in each of said chambers for removing chloramines from the water; said filter material includes filter floss and activated carbon; guide means for retaining said grids and said partitions in place to define said chambers; said meshed partitions are composed of crossed plastic louvers forming a grill of unrestricted openings for the passage of water at the bottom of said housing; said pump means is operably coupled to said middle chamber and includes a submerged motor.
Claim 2
Dependent Claim 176 words
In an out-of-doors aquarium or pond for holding and displaying live fish and plants, the combination which comprises: an immersion filter submerged in the body of water intended to be filtered; said filter including a housing of transparent composition having a mesh grid at one end and a pump means at its other end; said filter further including a plurality of chambers including a middle chamber between the opposite ends of said housing separated by meshed partitions so as to allow water flow through said housing from said grid at one end to said pumping means; water filtering material occupied in each of said chambers for removing chloramines from the water; said filter material includes filter floss and activated carbon; guide means for retaining said grids and said partitions in place to define said chambers; said meshed partitions are composed of crossed plastic louvers forming a grill of unrestricted openings for the passage of water at the bottom of said housing; said pump means is operably coupled to said middle chamber and includes a submerged motor.

References Cited (Backward Citations)

US2676921A Cited
US3662889A Cited
US3768651A Cited
US3883428A Cited
US4051032A Cited
US4072612A Cited
US4186093A Cited
US4421644A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-04-13 1990-10-13 1991-04-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-04-13 1994-10-13 1995-04-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-04-13 1998-10-13 1999-04-14 $7700.00 Window Closed / Lapsed

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