US3552379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food package and heater therefor
Assignee: Individual
•
Filing: 1968-11-22
•
Granted: 1971-01-05
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Expires: 1988-11-22
Abstract
Abstract A food package having a tray-type receptacle for food and a heater therefor comprised of a tray of dimensions similar to the food tray and adapted to support the same thereupon, a combustible material in the second tray, the second tray having air intake openings in the sidewalls thereof near the bottom and pressed out portions in its sidewalls extending to the top edge thereof forming vents for the products of combustion and to direct the heat uniformly throughout the lower surface of the food receptacle and around the sidewalls thereof.
Inventors
- 👤 Robert E Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:38
CPC Classifications
A; A47; A47G; A47G23/00; A47G23/06; A47G23/0683; B; B65; B65D; B65D1/00; B65D1/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
As a new article of manufacture a heater tray comprising: a. a bottom wall and upwardly and outwardly inclined sidewalls rising therefrom; b. the sidewalls having a number of spaced pressed out portions forming inwardly facing channels extending from the bottom to the top of the sidewalls; c. portions of the sidewalls between the channels and intermediate the height of said sidewalls extending outwardly and forming horizontal ledges interiorly of the sidewalls; d. openings in the sidewalls between the bottom of the tray and the said ledges; and e. a solid fuel attached to the bottom of the tray.
Claim 2
Dependent Claim
99 words
As a new article of manufacture a heater tray comprising: a. a bottom wall and upwardly and outwardly inclined sidewalls rising therefrom; b. the sidewalls having a number of spaced pressed out portions forming inwardly facing channels extending from the bottom to the top of the sidewalls; c. portions of the sidewalls between the channels and intermediate the height of said sidewalls extending outwardly and forming horizontal ledges interiorly of the sidewalls; d. openings in the sidewalls between the bottom of the tray and the said ledges; and e. a solid fuel attached to the bottom of the tray.
Claim 3
Dependent Claim
67 words
The structure defined in claim 1 in combination with a food tray having: a. a bottom wall and upwardly and outwardly inclined sidewalls rising therefrom; b. the bottom wall being of a size to rest upon said horizontal ledges of said heater tray; c. said inwardly facing channels in said heater tray forming vents extending from below said bottom of said food tray along the sidewalls thereof.
Claim 4
Dependent Claim
16 words
The structure defined in claim 1 in which the heater tray is formed of metal foil.
Claim 5
Dependent Claim
15 words
The combination defined in claim 2 in which both trays are formed of metal foil.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |