Tableware and method for surface treatment thereof,...

Details Tableware and method for surface treatment thereof,... Tableware and method for surface treatment thereof,...

2005-02-15

2005-02-15

Jenkins, Daniel (Department: 1742)

Metal treatment

Stock

Titanium, zirconium, or hafnium base

C148S671000

Reexamination Certificate

active

06855215

ABSTRACT:
Tableware of Ti or a Ti alloy having a surface hardened layer comprising a first hardened layer in which nitrogen and oxygen are diffused so as to form a solid solution and a second hardened layer which is formed in a region deeper than the first hardened layer. The substrate may have a hard decorative coating film. A substrate comprising Ti or a Ti alloy has on its surface an internal hardened layer comprising a first hardened layer and a second hardened layer, wherein the hard decorative coating film is formed on the surface of the internal hardened layer. The cutlery comprises a working part and a grip, the grip provided with a floating means such as a hollow part. Titanium tableware having excellent long-term mar resistance and high quality appearance, increasing the decorative value of the tableware. Further, a process for surface treatment to obtain the titanium tableware with high productivity and a substrate having a hard decorative coating film with excellent mar resistance and high surface hardness. The cutlery is lightweight, mar-resistant and can be easily handled.

REFERENCES:
patent: 3765954 (1973-10-01), Tokuda et al.
patent: 4512826 (1985-04-01), Whang
Derwent Jp Abstract, JP 11043760A, Feb. 16, 1999.*
Derwent Jp Abstract, JP 05077085A, Mar. 30, 1993.

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