Patent US3955007A successfully refreshed from Google Patents.
US3955007A
Expired / Lapsed
US
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Heat-holding method for food and the like
Assignee: Hatco Corp
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Filing: 1974-11-25
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Granted: 1976-05-04
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Expires: 1994-11-25
Abstract
Abstract A heat-holding method and apparatus for heated food and the like wherein a closed, inner heat-holding compartment with a moisture supply has an outer jacket which conveys heated gases in an upward course of travel without the necessity of a forced air system about the top, bottom and side of the compartment in such a way as to provide substantially uniform heating about the food for extended periods of time and maintain a desirable moisture content for the food.
Inventors
- 👤 Ronald R. Roderick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:47
CPC Classifications
A; A21; A21B; A21B1/00; A21B1/02; A21B1/06; A21B1/10; A21B3/00; A21B3/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A method of holding food and the like at substantially uniform temperature for extended periods of time while maintaining a desirable moisture content therein, comprising the steps of: a. confining a relatively still volume of gas about a food and the like, b. moving a flow of heated gas of a selected temperature about and in heat exchange relation to and relative to said volume of gas to provide substantially uniform heating of said volume of gas while at the same time maintaining said volume of gas in a relatively still condition, and c. introducing a controlled quantity of moisture arranged in open fluid communication with said volume of gas into said volume of gas.
Claim 2
Independent Claim
115 words
A method of holding food and the like at substantially uniform temperature for extended periods of time while maintaining a desirable moisture content therein, comprising the steps of: a. confining a relatively still volume of gas about a food and the like, b. moving a flow of heated gas of a selected temperature about and in heat exchange relation to and relative to said volume of gas to provide substantially uniform heating of said volume of gas while at the same time maintaining said volume of gas in a relatively still condition, and c. introducing a controlled quantity of moisture arranged in open fluid communication with said volume of gas into said volume of gas.
Claim 3
Dependent Claim
52 words
A method as set forth in claim 1 wherein said flow of heated gas moves through a course of travel beginning at a point below said confined relatively still volume of gas, then upwardly along opposite sides of said volume of gas, and finally across the top of said volume of gas.
Claim 4
Dependent Claim
26 words
A method as set forth in claim 1 wherein said moisture is introduced by evaporating moisture off a water surface having a selected controlled surface area.
Claim 5
Dependent Claim
23 words
A method as set forth in claim 1 wherein said water surface is in direct contact with said relatively still volume of gas.
Claim 6
Dependent Claim
27 words
A method as set forth in claim 1 wherein said heated gas is maintained at a temperature in the range of about 175° F. to 200° F.
Claim 7
Independent Claim
139 words
A method of holding food and the like at substantially uniform temperature for extended periods of time while maintaining a desirable moisture content therein, comprising the steps of: a. confining a relatively still volume of gas about a food and the like in a compartment having imperforate heat-conductive walls, b. maintaining a flow of heated gas of a selected temperature about said volume of gas i. along at least two pairs of perpendicular axes and ii. about a major portion of the external surface of said volume of gas to provide substantially uniform heating of the gas while at the same time maintaining said volume of gas in a relatively still condition, and c. simultaneously introducing a controlled quantity of moisture in open fluid communication with said volume of gas into said volume of gas during the heating thereof.
Claim 8
Independent Claim
139 words
A method of holding food and the like at substantially uniform temperature for extended periods of time while maintaining a desirable moisture content therein, comprising the steps of: a. confining a relatively still volume of gas about a food and the like in a compartment having imperforate heat-conductive walls, b. maintaining a flow of heated gas of a selected temperature about said volume of gas i. along at least two pairs of perpendicular axes and ii. about a major portion of the external surface of said volume of gas to provide substantially uniform heating of the gas while at the same time maintaining said volume of gas in a relatively still condition, and c. simultaneously introducing a controlled quantity of moisture in open fluid communication with said volume of gas into said volume of gas during the heating thereof.
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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |