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US 4,505,961 AGranted
Microwavable heat and grease resistant containers and method for their preparation
AssigneeMobil Oil Corporation
InventorPang-Chia Lu
Life of this patent
Estimating the term…
Abstract
Multi-layer containers are rendered resistant to hot fats under microwave conditions by coating the substrate which is not fat resistant with a cellulose ester layer such as cellulose acetate propionate.
Claims3
A multi-layer container adapted for microwave heating in the presence of hot fat comprising an interior layer and at least one thermoplastic exterior layer in contact with said interior layer, which exterior layer is not itself resistant to hot fat under microwave cooking conditions;
- said interior layer, which provides hot fat resistance, comprising a cellulose acetate propionate;
- said exterior layer being compatible with cellulose acetate propionate and containing recycled cellulose acetate propionate.
Dependencies are inferred from the claim text.