Stick resistant coating for cookware
AssigneeClad Metals LLC
InventorWilliam A. Groll
Life of this patent
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Abstract
A method for making a stick resistant cook surface or cooking vessel having the stick resistance in which a hard substrate metal is buffed/polished to a high luster surface finish of less than 20 micro inches and then coated with a layer of zirconium nitride. The method further includes the step of polishing a stamped blank to the desired surface smoothness prior to the drawing/shaping step to provide a stick resistant surface in cooking vessels having side walls, such as pots and pans, which are otherwise difficult to buff in the interior due to the side wall geometry.
Claims6
A method for making a cooking utensil having a stick resistant cook surface comprising the steps of:
- (a) providing a metal sheet;
- (b) stamping a flat blank from the metal sheet;
- (c) forming a bright luster finish on said blank;
- (d) drawing said bright luster finished blank to shape a cooking utensil of a desired configuration;
- and
- (e) applying a layer of zirconium nitride to at least a cooking surface of said cooking utensil to provide a stick resistant cook surface thereon.
Dependencies are inferred from the claim text.