Patent US4335181A successfully refreshed from Google Patents.
US4335181A
Expired / Lapsed
US
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Microwaveable heat and grease resistant containers
Assignee: Mobil Oil AS
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Filing: 1980-07-01
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Granted: 1982-06-15
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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 04:46
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.
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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) | 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 |