US4335181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwaveable heat and grease resistant containers
Assignee: Mobil Oil AS
•
Filing: 1980-07-01
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Granted: 1982-06-15
•
Expires: 2000-07-01
Abstract
Abstract There are provided microwaveable shaped articles of a laminate of heat resistant film and a substrate of foamed or unfoamed sheet of polymers or copolymers with a softening temperature below 190° F., in which the heat resistant film is on the interior surface.
Inventors
- 👤 John P. Marano, Jr.
- 👤 Maya S. Farag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:53
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B32B27/08; B32B27/30; B32B27/308; B32B27/36; B32B5/00; B32B5/18; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2307/00; B32B2307/30; B32B2307/306; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
Shaped articles of a laminate of non-crosslinked heat resistant film and a substrate of foamed or unfoamed sheet of polymers or copolymers with a softening temperature below 190° F., in which the heat resistant film is on the interior surface; said articles being resistant to hot fats when heated in microwave oven.
Claim 2
Dependent Claim
52 words
Shaped articles of a laminate of non-crosslinked heat resistant film and a substrate of foamed or unfoamed sheet of polymers or copolymers with a softening temperature below 190° F., in which the heat resistant film is on the interior surface; said articles being resistant to hot fats when heated in microwave oven.
Claim 3
Dependent Claim
14 words
Shaped articles defined in claim 1, wherein said heat resistant film is polyacrylonitrile film.
Claim 4
Dependent Claim
15 words
Shaped articles defined in claim 1, wherein said heat resistant film is polyethylene terphthalate film.
Claim 5
Dependent Claim
16 words
Shaped articles defined in claims 1, 2, or 3, wherein said substrate is foamed poly(p-methylstyrene) sheet.
Claim 6
Dependent Claim
16 words
Shaped articles defined in claims 1, 2, or 3, wherein said substrate is foamed polystyrene sheet.
Claim 7
Dependent Claim
17 words
Shaped articles as defined in claims 1, 2, or 3, wherein said substrate is unfoamed polyethylene sheet.
Claim 8
Dependent Claim
17 words
Shaped articles as defined in claims 1, 2, or 3, wherein said substrate is unfoamed polypropylene sheet.
References Cited (Backward Citations)
US3444283A
Cited
US3619445A
Cited
US3649437A
Cited
US3682730A
Cited
US4022646A
Cited
US4015033A
Cited
US4111349A
Cited
US4066731A
Cited
US4086287A
Cited
US4107362A
Cited
US4205114A
Cited
US4218510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |