Patent US4238669A successfully refreshed from Google Patents.
US4238669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven having dual heating means
Assignee: Individual
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Filing: 1978-04-03
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Granted: 1980-12-09
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Expires: 1998-04-03
Abstract
Abstract An oven is disclosed adapted to heat a food item of the type having a crust portion and a filler portion lying on the crust portion, characterized in that a first electrical heating member, adapted for substantially constant heating operation at a predetermined temperature, is stationed in the oven adjacent the crust portion, and a second heating member, having a greater thermal intensity than the first heating means and adapted for substantially brief heating operation at a temperature higher than the predetermined temperature, is stationed in the oven adjacent the filler portion.
Inventors
- 👤 James H. Huntley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:12
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/04; F24C7/046; A; A47; A47J; A47J37/00; A47J37/06; A47J37/0623; A47J37/0629
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
An oven for heating the upper portion of a food item under intense heat and for heating the lower portion of the food item with less intense heat, said oven comprising a housing having upper and lower portions; quartz rod heating means positioned at the upper portion of said housing, and energizable to heat to a relatively high temperature; heating coil means positioned below said quartz rod heating means; support means for holding a food item between said quartz rod heating means and said heating coil means; thermostat means for controlling only the operation of said heating coil means, said thermostat means establishing a relatively low temperature in said heating coil means to heat the lower portion of the food item; and timing means for controlling only the operation of said quartz rod heating means, said timing means being actuable to energize said quartz rod heating means after a preselected time period after the establishment of the relatively low temperature to heat the upper portion of the food item and to de-energize said quartz rod heating means a preselected time period later.
Claim 2
Dependent Claim
182 words
An oven for heating the upper portion of a food item under intense heat and for heating the lower portion of the food item with less intense heat, said oven comprising a housing having upper and lower portions; quartz rod heating means positioned at the upper portion of said housing, and energizable to heat to a relatively high temperature; heating coil means positioned below said quartz rod heating means; support means for holding a food item between said quartz rod heating means and said heating coil means; thermostat means for controlling only the operation of said heating coil means, said thermostat means establishing a relatively low temperature in said heating coil means to heat the lower portion of the food item; and timing means for controlling only the operation of said quartz rod heating means, said timing means being actuable to energize said quartz rod heating means after a preselected time period after the establishment of the relatively low temperature to heat the upper portion of the food item and to de-energize said quartz rod heating means a preselected time period later.
Claim 3
Dependent Claim
15 words
The oven of claim 1 in which said relatively low temperature is about 500° F.
Claim 4
Dependent Claim
15 words
The oven of claim 1 in which said relatively high temperature is about 1000° F.
Claim 5
Dependent Claim
15 words
The oven of claim 1 in which said support means comprises a conductive metal plate.
References Cited (Backward Citations)
US1392802A
Cited
US2668221A
Cited
US3244859A
Cited
US3265861A
Cited
US3487198A
Cited
US3515854A
Cited
US3548153A
Cited
US3682643A
Cited
US3626155A
Cited
US3655942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |