Sharpener Blade
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United States of America Patent
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N/A
Issued Date -
Jul 31, 2008
app pub date -
Jan 24, 2008
filing date -
Jan 24, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A sharpener blade is made of a steel body for sharpening a colored, graphite or cosmetic pencil. On the steel body is a chemically bonded, inorganic protective coating that contains at least one element selected from the group containing the metals of the main groups III and IV and the B-groups of the periodic system of elements, and oxides, ceramics, nitrides, carbides, silicides and borides of these. A sharpener blade of this type has permanent protection against corrosion, along with high sharpness and hardness levels. At the same time, it can be colored.
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