CERAMIC WRITING BALL
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United States of America Patent
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Issued Date -
Oct 10, 2024
app pub date -
Jun 27, 2022
filing date -
Jun 30, 2021
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Abstract
The present disclosure relates to a system comprising a writing instrument. The writing instrument comprises a ceramic writing ball. The ceramic writing ball comprises relative to the total weight of the ceramic writing ball about 1.0 wt.-% to about 14.6 wt.-% of one or more metal oxides selected from Y2O3, HfO, MgO, CaO and/or Ce2O3, about 0.15 wt.-% to about 3.0 wt.-% Al2O3, and ZrO2 as balance.
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