Patent US4233702A successfully refreshed from Google Patents.
US4233702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fish tank rock cleaner
Assignee: Individual
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Filing: 1979-08-16
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Granted: 1980-11-18
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Expires: 1999-08-16
Abstract
Abstract A fish tank cleaning system comprising a water pump, a hose connected to the water pump, a stone cleaning tool comprising a housing, the lower end of the housing being open to engage rocks on the bottom of an aquarium, a stirring rod moveably extending through the housing for stirring the rocks, the other end of the hose being connected to an outlet of said housing disposed above the bottom of the housing.
Inventors
- 👤 Michael R. Zweifel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:37
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1618; E04H4/1636; A; A01; A01K; A01K63/00; A01K63/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A fish tank rock cleaning device comprising a housing with an open bottom to be rested on rock in the bottom of said aquarium, a stirring rod extended through said housing and moveable with respect to said housing for the stirring of said rock with an inner part of said rod by manipulating the outer part of said rod, a hose being attached to said housing at a point substantially spaced above said open bottom whereby said hose can be connected to a pump.
Claim 2
Dependent Claim
84 words
A fish tank rock cleaning device comprising a housing with an open bottom to be rested on rock in the bottom of said aquarium, a stirring rod extended through said housing and moveable with respect to said housing for the stirring of said rock with an inner part of said rod by manipulating the outer part of said rod, a hose being attached to said housing at a point substantially spaced above said open bottom whereby said hose can be connected to a pump.
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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |