US3643801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable aquarium filter
Assignee: Individual
•
Filing: 1969-08-22
•
Granted: 1972-02-22
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Expires: 1989-08-22
Abstract
Abstract A disposable aquarium filter has a filter medium sealed within a filter housing. The housing has one compartment for the filter medium and another compartment for receiving the end portion of an air supply tube, the compartments being oriented and arranged so that air discharging from the air supply tube functions to circulate water through the filter compartment. When the filter medium becomes contaminated or clogged, the entire filter including the housing with the filter medium therein is discarded. A new, unused filter is installed by withdrawing the air supply tube from the old filter and reinserting it into the new filter.
Inventors
- 👤 Harry Zelenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
A disposable aquarium filter comprising a unitary, selfcontained housing formed of a back sheet and a front sheet coextensive therewith and laminated thereto, at least one of said sheets being blistered, said blisters defining a vertically disposed filter compartment and an air and water compartment vertically disposed and horizontally adjacent said filter compartment, said filter compartment containing a filter medium sealed therein, inlet openings at an upper end portion of said back sheet for admitting water to said filter compartment, air and water outlet openings at an upper end portion of said back sheet for discharging air and water from said air and water compartment, said latter compartment having an air supply inlet aperture, passage means extending horizontally between and connecting said two compartments at a lower end portion of said housing, whereby air discharged into said air and water compartment rises in the latter compartment drawing in water from the lower portion of the adjacent filter compartment for discharge with said air through said air and water outlet openings.
Claim 2
Dependent Claim
170 words
A disposable aquarium filter comprising a unitary, selfcontained housing formed of a back sheet and a front sheet coextensive therewith and laminated thereto, at least one of said sheets being blistered, said blisters defining a vertically disposed filter compartment and an air and water compartment vertically disposed and horizontally adjacent said filter compartment, said filter compartment containing a filter medium sealed therein, inlet openings at an upper end portion of said back sheet for admitting water to said filter compartment, air and water outlet openings at an upper end portion of said back sheet for discharging air and water from said air and water compartment, said latter compartment having an air supply inlet aperture, passage means extending horizontally between and connecting said two compartments at a lower end portion of said housing, whereby air discharged into said air and water compartment rises in the latter compartment drawing in water from the lower portion of the adjacent filter compartment for discharge with said air through said air and water outlet openings.
Claim 3
Dependent Claim
61 words
A disposable aquarium filter according to claim 1 wherein said blistered sheet is formed with a depressed portion defining a restricted passage dividing said filter compartment into two sections, each of said sections containing a different filter medium, said restricted passage being constructed and arranged to maintain the two filter media in their respective compartments while allowing water to pass therebetween.
Claim 4
Dependent Claim
33 words
A disposable aquarium filter according to claim 1 wherein said back sheet is substantially flat and said front sheet has blisters configured to define said filter compartment and said air and water compartment.
Claim 5
Dependent Claim
42 words
A disposable aquarIum filter according to claim 3 wherein means are provided for sealing said two sheets to one another at selected seal areas, one of said seal areas extending between said compartment and another extending around the border of the housing.
Claim 6
Dependent Claim
51 words
A disposable aquarium filter according to claim 4 wherein said one seal area has a lower end terminating at the upper end of said passage means, and the air supply inlet aperture is disposed in said air and water compartment above the elevation of the upper end of said passage means.
Claim 7
Dependent Claim
36 words
A disposable aquarium filter according to claim 3 wherein said passage means is defined in part by a blister on said front sheet connecting the blisters defining the filter compartment and the air and water compartment.
Claim 8
Dependent Claim
35 words
A disposable aquarium filter according to claim 3 further comprising protrusions in said back sheet in the area of said passage means to restrict said passage means and prevent the filter medium from passing therethrough.
Claim 9
Dependent Claim
51 words
A disposable aquarium filter according to claim 1 wherein said housing is elongated and adapted to be totally immersed in an aquarium tank with its longitudinal axis substantially vertically disposed, said inlet openings and air and water outlet openings being located at the upper longitudinal end portion of said elongated housing.
Claim 10
Dependent Claim
29 words
A disposable aquarium filter according to claim 1 wherein said air and water compartment has a transverse cross-sectional area greater than the outer diameter of said air supply conduit.
References Cited (Backward Citations)
US3487440A
Cited
US3540593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |