US4351997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food package
Assignee: Societe des Produits Nestle SA
•
Filing: 1980-08-20
•
Granted: 1982-09-28
•
Expires: 2000-08-20
Abstract
Abstract The invention relates to a food package for controlled heating or cooking of prepared food in hot air, convection, household and microwave ovens. The package comprises a tray (1) including a bottom wall (2) and an upwardly extending peripheral wall (3) which is outwardly curved at its upper end, defining a horizontally extending peripheral rim (4), said peripheral wall and rim being of or at least their inner surface being coated with a microwave radiation-reflecting or opaque material (5) and said bottom wall (2) being of a microwave radiation-transparent material or being easily removable.
Inventors
- 👤 Lennart Mattisson
- 👤 Bertil Ganrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D81/3453; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3471; B65D2581/3472; B65D2581/3486; B65D2581/3489
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A food package for controlled heating of prepared food in hot air, convection, household and microwave ovens, said package comprising a tray including a bottom wall transparent to microwave radiation and a peripheral structure, said peripheral structure including a peripheral wall extending upwardly from said bottom wall and a rim extending outwardly from said peripheral wall at the top thereof, at least a portion of said peripheral structure incorporating a microwave radiation reflecting material.
Claim 2
Dependent Claim
74 words
A food package for controlled heating of prepared food in hot air, convection, household and microwave ovens, said package comprising a tray including a bottom wall transparent to microwave radiation and a peripheral structure, said peripheral structure including a peripheral wall extending upwardly from said bottom wall and a rim extending outwardly from said peripheral wall at the top thereof, at least a portion of said peripheral structure incorporating a microwave radiation reflecting material.
Claim 3
Dependent Claim
66 words
A food package for controlled heating of prepared food in hot air, convection, household and microwave ovens comprising a tray including a metallic bottom wall and a metallic peripheral structure, said peripheral structure including a peripheral wall extending upwardly from said bottom wall and a rim extending outwardly from said peripheral wall at the top thereof, said bottom wall being releasably connected to said peripheral wall.
Claim 4
Dependent Claim
66 words
A food package for controlled heating of prepared food in hot air, convection, household and microwave ovens comprising a tray including a metallic bottom wall and a metallic peripheral structure, said peripheral structure including a peripheral wall extending upwardly from said bottom wall and a rim extending outwardly from said peripheral wall at the top thereof, said bottom wall being releasably connected to said peripheral wall.
Claim 5
Dependent Claim
48 words
A food package according to claim 1, in which the tray is formed from a polymer-coated paperboard, the peripheral wall of said tray being coated with a metallic foil on its inner surface, the rim of said tray being coated with said metallic foil on its upper surface.
Claim 6
Dependent Claim
26 words
A food package according to claim 3, in which the peripheral wall is partly coated with said metallic foil on its internal surface around each corner.
Claim 7
Dependent Claim
117 words
A food package according to claim 3 or 4 in which the coating of said foil on said rim extends over only an inner portion of said rim which is adjacent to said peripheral wall, the outer part of the rim which extends from the end of the metallic foil up to the edge of the rim being provided with a peripheric perforation line near to the end of the metallic foil, so that the outer part of the rim is joined to the tray with small notches only, said package further comprising a lid incorporating a polymer, the lid being attached to the outer part of the rim of the tray, said lid covering said tray.
Claim 8
Dependent Claim
65 words
A food package according to claim 3 or 4, in which the entire upper surface of said rim of the tray is coated with said metallic foil and said rim is provided in its middle with a perforation line, said package further comprising a lid incorporating a polymer, said lid being attached to the rim outboard of said perforation line, said lid covering said tray.
Claim 9
Dependent Claim
24 words
A food package according to claim 1 or 2, further comprising a metallic lid releasably secured to said tray, said lid covering said tray.
References Cited (Backward Citations)
US2714070A
Cited
US3941967A
Cited
US3974354A
Cited
US4081646A
Cited
US4183435A
Cited
US4210674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |