A microwaveable package containing foodstuff is for direct placement with or without opening same, in a microwave oven so that the foodstuff can be microwave cooked. The foodstuff rests on a sheet of microwave receptor material and the package is designed so that there is an air space between the receptor...http://www.google.de/patents/US5252793?utm_source=gb-gplus-sharePatent US5252793 - Microwave container assembly
