Cryogenic treatment of cookware and bakeware
AssigneeClad Metals LLC
InventorWilliam A. Groll
Life of this patent
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Abstract
A method of making cookware and bakeware having a stick resistant and mar resistant cook surface comprising the steps of providing a cooking utensil having a cook surface, and cryogenically treating the cooking utensil at one or more selected temperatures comprising −100° F. to −300° F. or lower to harden said cook surface. The cooking utensil may have a bare metal cook surface, or it may be coated with a stick resistant coating such as one of a PTFE, metal nitride or sulfide coating or combinations thereof prior to the cryogenic hardening treatment.
Claims25
A method of making a stick resistant and mar resistant cook surface comprising the steps of:
- (a) providing a cooking utensil having a cook surface;
- and
- (b) cryogenically treating the cooking utensil at temperatures comprising −100° F. or lower to harden said cook surface and thereafter raising the temperature to a temperature between ambient and +300° F., whereby the hardness and stick resistance of the cook surface is improved over an untreated surface.
A method of making a stick resistant and mar resistant cooking utensil comprising the steps of:
- (a) providing a cooking utensil comprising a multi-layer clad metal construction having a core including one or both of copper and aluminum and one or more layers of stainless steel, bonded to said core, wherein an inner layer of stainless steel defines a cook surface;
- and
- (b) cryogenically treating the cooking utensil at one or more temperatures of −100° F. or lower to harden the cook surface.
A method of making a stick resistant and mar resistant cooking utensil comprising the steps of:
- (a) providing a cooking utensil comprising a multi-layer clad metal construction having a core including one or both of copper and aluminum and one or more layers of stainless steel, bonded to said core, wherein an inner layer of stainless steel defines a cook surface;
- (b) applying a stick resistant coating to said cook surface;
- and
- (c) cryogenically treating the cooking utensil at temperatures of −100° F. or lower to harden the cook surface.
A cooking utensil comprising one or more layers of (aluminum having a cook surface, said cooking utensil having been subjected to a cryogenic treatment whereby the hardness and stick resistance of the cook surface is improved over an untreated surface.
A cooking utensil having a polymeric non-stick coating applied to a cook surface, said cooking utensil having been subjected to a cryogenic treatment whereby the hardness and stick resistance of the cook surface is improved over an untreated surface.
Dependencies are inferred from the claim text.