Patent ID: 9125512
Filing Date: 2015-09-08
Classification: A47J

Abstract:
1. A cooking vessel comprising an upper element that defines a cook surface and a lower metal shell that defines a heat surface for contact with a heat source during heating, the upper element and the lower metal shell being joined together such that the cook surface and the heat surface are retained in a fixed spatial relationship with each other and a gas-filled hollow cavity is defined between the heat surface of the lower shell and the cook surface of the upper element and with no liquid content between the upper element and the lower metal shell, wherein the gas-filled hollow cavity is sealed to prevent the escape of the gas enclosed within the gas-filled hollow cavity, the gas in the gas-filled hollow cavity is a material or mixture of materials that is a gas at 0° C. and the gas pressure in the gas-filled hollow cavity is 50 to 300 kPa actual at 21° C.