US3596059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food container heating system
Assignee: Armstrong World Industries Inc
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Filing: 1969-09-29
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Granted: 1971-07-27
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Expires: 1989-09-29
Abstract
Abstract The container-heating system comprises a three part structure consisting of a food container, a heater integral therewith, and a power supply receptacle for the heater. The power supply receptacle may use either a car electrical system or a transformer structure which converts 110 v. to 12 v. The heater is a special high-output heater which is fastened to the base of the food container. The food container with its heater is placed upon the power supply and the heater rapidly heats the food within the container.
Inventors
- 👤 Nathaniel E Hager Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/004; H; H05; H05B; H05B3/00; H05B3/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
A disposable container and heater heating system for food and the like wherein there is provided an electrical power supply receptacle adapted to provide electrical power for a heater, a thin-walled, one-time use metal container, the wall thickness of the container being so constructed that it lacks the ability to accumulate and uniformly distribute heat to the contents thereof, said heater comprising a layer of electrical resistance material integral with and centrally disposed only on the outside bottom surface of said container, said electrical resistance material having electrical contact elements thereon adapted to be connected to a source of electrical current whereby, when the combined heater and container are placed upon the power supply receptacle, the heater is disposed only below the contents of the container and said power supply receptacle is provided with a thermally insulated surface containing electrical contacts which connect the source of electrical current with the heater and the thermal insulation causes the heater to direct most of its heat toward the food in the container to be heated.
Claim 2
Dependent Claim
173 words
A disposable container and heater heating system for food and the like wherein there is provided an electrical power supply receptacle adapted to provide electrical power for a heater, a thin-walled, one-time use metal container, the wall thickness of the container being so constructed that it lacks the ability to accumulate and uniformly distribute heat to the contents thereof, said heater comprising a layer of electrical resistance material integral with and centrally disposed only on the outside bottom surface of said container, said electrical resistance material having electrical contact elements thereon adapted to be connected to a source of electrical current whereby, when the combined heater and container are placed upon the power supply receptacle, the heater is disposed only below the contents of the container and said power supply receptacle is provided with a thermally insulated surface containing electrical contacts which connect the source of electrical current with the heater and the thermal insulation causes the heater to direct most of its heat toward the food in the container to be heated.
Claim 3
Dependent Claim
19 words
The system of claim 1 wherein the heater covers less than one-half of the outside area of the container.
Claim 4
Dependent Claim
28 words
The system of claim 2 wherein the heater generates heat everywhere within its perimeter at a rate per unit area substantially equal to the average within said perimeter.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |