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US 2010/0247273 A1Published application
Cookware with Tarnish Protected Exterior
AssigneeMeyer Intellectual Properties Limited
InventorStanley Kin Sui Cheng
Life of this patent
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Abstract
An article of cookware in the form of a cooking vessel exposes only a portion of a copper inner layer on the upper portion of the exterior sidewall. The layer does not change color or tarnish as it sufficiently distal from the bottom of the cooking vessel that it is not subject to direct heat and oxidation during normal use. The unique bright color of the native copper is further protected from tarnish caused by fingerprint by a protective coating that can withstand moderate heating.
Claims20
A method of fabricating a cooking vessel, the method comprising the steps of:
- a. providing a first substantially planar sheet of a metal to form the inner lining of the cookware article,
- b. providing a second substantially planar sheet of copper or an alloy thereof,
- c. providing a third substantially planar sheet of stainless steel,
- d. drawing each of the first, second and third planar sheets to respectively form the first, second and third preforms thereof, wherein each preform is a vessel capable of retaining fluid that has a bottom and an upward extending sidewall that surrounds and connects to the bottom and terminates at an upper rim wherein:
- i. the third preform nests within the second preform;
- and
- ii. the second preform nests within the third preform, the third perform being shorter than the first and second preforms so as to form only the exterior bottom and a lower exterior portion of the surrounding sidewalls of the cooking vessel,
- e. attaching the first preform to interior of the second preform,
- f. attaching the second preform to the interior of the third preform,
- g. attaching a co-extensive portion of the periphery of the sidewall of the first preform and second preform to form the rim of the cooking vessel.
7 more elements
Dependencies are inferred from the claim text.