US3821514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for warming aquarium water
Assignee: APA Mfg
•
Filing: 1973-02-21
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Granted: 1974-06-28
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Expires: 1993-02-21
Abstract
Abstract The aquarium comprises at least a filter, a gas discharge tube for lighting the aquarium, a load resistance for this tube, a water tight and electrically insulated casing in which aforesaid load resistance is housed, whereby the outlet of aforesaid filter is directed upon the housing, which is heated by the load resistance, for the purpose of heating this water which flows over it from aforesaid outlet into the aquarium.
Inventors
- 👤 C Lambo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:21
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A device for heating water in an aquarium comprising a water filter having an outlet, means for supplying water to said filter, a gas discharge tube capable of lighting the aquarium, a load resistance, an electrical circuit including said tube and resistance, a water tight and electrically insulated casing housing said resistance and means capable of being mounted on the top of the aquarium and supporting said tube, filter and said casing with said filter outlet positioned for directing water from said filter upon said casing which is heated by said resistance whereby the water from said filter outlet passing over said casing is heated before flowing therefrom.
Claim 2
Independent Claim
108 words
A device for heating water in an aquarium comprising a water filter having an outlet, means for supplying water to said filter, a gas discharge tube capable of lighting the aquarium, a load resistance, an electrical circuit including said tube and resistance, a water tight and electrically insulated casing housing said resistance and means capable of being mounted on the top of the aquarium and supporting said tube, filter and said casing with said filter outlet positioned for directing water from said filter upon said casing which is heated by said resistance whereby the water from said filter outlet passing over said casing is heated before flowing therefrom.
Claim 3
Dependent Claim
32 words
A device as claimed in claim 1 including a plurality of protruding elements in contact with said casing and said filter outlet is positioned for directing the water between said protruding elements.
Claim 4
Dependent Claim
64 words
A device as claimed in claim 2 including a closed chamber connected to said casing, said protruding elements being partitions positoned in a zig-zag manner inside said chamber and being in contact with said casing providing a zig-zag channel, means connecting said filter outlet to one end of said channel and said chamber having a water outlet at the other end of said channel.
Claim 5
Dependent Claim
16 words
A device as claimed in claim 3 wherein said chamber is detachably mounted on said casing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |