US4982064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave double-bag food container
Assignee: Fort James Corp
•
Filing: 1990-05-31
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Granted: 1991-01-01
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Expires: 2010-05-31
Abstract
Abstract A package for use in cooking or heating a food product in a microwave oven which comprises an outer paper container and an inner liner and a microwave interactive heater comprising a coating composition printed onto the surface of a suitable substrate or a selected portion of the outer container or inner liner. The coating composition preferably comprises finely divided carbon, aluminum flake, clay and a binder in a preferred embodiment, a polyester inner liner eliminates the need for an overwrap in packages containing a food product, such as popcorn and an oil.
Inventors
- 👤 Richard R. Hartman
- 👤 Bradley D. Berger
- 👤 Kimberly J. DeHaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:47
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D81/3461; B65D81/3469; B65D2581/00; B65D2581/34; B65D2581/3401; B65D2581/3402; B65D2581/3421; B65D2581/3437; B65D2581/3439; B65D2581/3447; B65D2581/3448; B65D2581/3463; B65D2581/3464; B65D2581/3471; B65D2581/3472; B65D2581/3483; B65D2581/3486; B65D2581/3494; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A paper bag food container which can be placed in a microwave oven to heat the food therein comprising a greaseproof inner bag to hold said food, a paper outer beg surrounding and adhesively attached to said inner bag, and a heating element comprising a coating of a microwave reactive composition of a finely divided microwave reactive metal, carbon black, powdered inert solid material and a dielectric binder applied directly to the inner surface of the outer beg and adhesively attached to the outer surface of the inner bag.
Claim 2
Dependent Claim
89 words
A paper bag food container which can be placed in a microwave oven to heat the food therein comprising a greaseproof inner bag to hold said food, a paper outer beg surrounding and adhesively attached to said inner bag, and a heating element comprising a coating of a microwave reactive composition of a finely divided microwave reactive metal, carbon black, powdered inert solid material and a dielectric binder applied directly to the inner surface of the outer beg and adhesively attached to the outer surface of the inner bag.
Claim 3
Dependent Claim
17 words
A paper food container as defined in claim 1 wherein the inner bag comprises a polyester film.
Claim 4
Dependent Claim
19 words
A paper food container as defined in claim 1 wherein the inner bag is formed of a polyester film.
Claim 5
Dependent Claim
18 words
A paper food container as defined in claim 1 wherein the inner bag is formed of greaseproof paper.
Claim 6
Dependent Claim
12 words
A food container according to claim 1 wherein the metal is aluminum.
Claim 7
Dependent Claim
17 words
A food container according to claim 1 wherein the dielectric binder is a water based latex emulsion.
Claim 8
Dependent Claim
15 words
A food container according to claim 1 wherein the powdered inert solid material is clay.
Claim 9
Dependent Claim
15 words
A food container according to claim 1 wherein the powdered inert solid material is silica.
Claim 10
Dependent Claim
58 words
A food container according to claim 1 wherein the heating element on the inner surface of the outer bag is applied in the form of a grid pattern wherein the area covered by the microwave reactive coating composition forming the pattern is within the range of 35 to 80 percent of the total area of the heating element.
Claim 11
Dependent Claim
33 words
A food container according to claim 9 wherein the area covered by the microwave reactive coating composition of the grid pattern is approximately equal to the uncoated area contained within the grid pattern.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |