Receptacles – Cookware
Reexamination Certificate
2001-09-12
2002-05-07
Beck, Shrive P. (Department: 1762)
Receptacles
Cookware
C428S626000, C427S402000, C427S407100, C427S409000
Reexamination Certificate
active
06382454
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a non-stick coating with improved scratch resistance.
Non-stick coatings applied to cookware are known. Such coatings are also known to be prone to scratching.
Such coatings are routinely applied to a hard undercoat of alumina, enamel, stainless steel or polyamide-imide (PAI) to improve their scratch resistance.
In principle, that undercoat forms a barrier that prevents scratches from reaching the surface of the substrate.
SUMMARY OF THE INVENTION
The present invention aims to provide a non-stick coating with a scratch resistance that is improved over known coatings, while retaining excellent non-stick properties.
The invention provides a non-stick coating with improved scratch resistance, comprising an undercoat applied to a substrate, coated with a primary coat comprising a fluorocarbon resin and one or more fluorocarbon resin-based outer coats.
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patent: 5536583 (1996-07-01), Roberts et al.
patent: 5562991 (1996-10-01), Tannenbaum
patent: 5846645 (1998-12-01), Yokota et al.
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patent: 0786290 (1997-07-01), None
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Buffard Jean-Pierre
Fontaine Michel
Gardaz Claudine
Bachman & LaPointe P.C.
Beck Shrive P.
Fletcher, III Willaim Phillip
SEB SA
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