Coating processes – With post-treatment of coating or coating material – Heating or drying
Reexamination Certificate
2002-07-08
2008-08-12
Parker, Fred J. (Department: 1792)
Coating processes
With post-treatment of coating or coating material
Heating or drying
C427S376400, C427S376500, C427S397700
Reexamination Certificate
active
07410672
ABSTRACT:
A water-resistant porcelain enamel coating and method of making the same is provided. The porcelain enamel coating is prepared using a borosilicate glass frit, and mill additions of silica and a zirconia compound. The mixture is applied to a metal substrate and fired, resulting in a water-resistant coating that resists cracking and crazing. The coating is particularly useful in water heaters. In one embodiment, the coating comprises a fine zirconia compound having a median particle size of less than 10 microns.
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Knoeppel Ray O.
Pfendt Glenn
Waters James D
AOS Holding Company
Michael & Best & Friedrich LLP
Parker Fred J.
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