US3768651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquarium filter
Assignee: Individual
•
Filing: 1971-09-22
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Granted: 1973-10-30
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Expires: 1991-09-22
Abstract
Abstract An aquarium filter dimensioned for resting on the top rear portion of an aquarium in which unfiltered water from the aquarium tank is pumped into first and second end fittings which communicate with first and second end compartments, being separated by a removable recessed center box. The first and second end compartments contain filter wool and communicate with the removable box through a plurality of apertures in each side of the removable center box, the box being filled with charcoal. A riser tube rises through the charcoal in the central removable box and communicates with the aquarium tank forming an exhaust thereto after the filtering.
Inventors
- 👤 W Streeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:20
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
An aquarium filter dimensioned for resting on the top rear portion of an aquarium comprising: an aquarium tank; first and second end compartments containing filter wool, said end compartments located at a top portion of said tank and at opposite ends thereof; first and second end fittings disposed outside of said first and second end compartments, respectively, said first and second fittings communicating with said first and second end compartments, respectively first and second pumps disposed at a bottom portion of said tank and at opposite ends thereof beneath said first and second fittings and coupled thereto; a center compartment filled with charcoal disposed between said first and second compartments, and communicating therewith; and exhaust means coupling said center compartment with said aquarium tank.
Claim 2
Dependent Claim
124 words
An aquarium filter dimensioned for resting on the top rear portion of an aquarium comprising: an aquarium tank; first and second end compartments containing filter wool, said end compartments located at a top portion of said tank and at opposite ends thereof; first and second end fittings disposed outside of said first and second end compartments, respectively, said first and second fittings communicating with said first and second end compartments, respectively first and second pumps disposed at a bottom portion of said tank and at opposite ends thereof beneath said first and second fittings and coupled thereto; a center compartment filled with charcoal disposed between said first and second compartments, and communicating therewith; and exhaust means coupling said center compartment with said aquarium tank.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |