Method of making non-stick cookware

Details Method of making non-stick cookware Method of making non-stick cookware

2004-03-19

2009-02-10

Fletcher, III, William Phillip (Department: 1792)

Coating processes

Vacuum utilized prior to or during coating

C427S515000, C427S521000, C427S350000, C427S387000, C427S402000

Reexamination Certificate

active

07488515

ABSTRACT:
A non-stick surface comprising a porous, hard metal-ceramic coating such as chromium oxide applied to the cook surface of a cooking utensil by arc or plasma spraying. The pores of the coating are impregnated under vacuum with an inert release agent of low viscosity such as food grade liquid silicon resin. After vacuum impregnation, the impregnate is thermally cured and the cook surface is mechanically abraded/polished to remove the protruding peaks of metal-ceramic material to expose flattened bare metal portions interspersed between and substantially co-planar with the surfaces of the impregnated release agent residing in the valleys/pores.

REFERENCES:
patent: 3271653 (1966-09-01), Wolf
patent: 4204021 (1980-05-01), Becker
patent: 4646935 (1987-03-01), Ulam
patent: 5320879 (1994-06-01), Bullock
patent: 5952112 (1999-09-01), Spring
patent: 6267830 (2001-07-01), Groll
patent: 6360423 (2002-03-01), Groll

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