Back to results
US 12,330,444 B2Granted
Ceramic writing ball
AssigneeSociete BIC
InventorsJulien Bouchet, Ghislain Alves
Life of this patent
Estimating the term…
Abstract
A system may include a writing instrument. The writing instrument may include a ceramic writing ball. The ceramic writing ball may include, 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, and about 0.15 wt.-% to about 3.0 wt.-% Al2O3, and ZrO2 as balance.
Claims20
A writing instrument comprising:
- a ceramic writing ball,
- wherein 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 Y2O3, HfO, MgO, CaO and/or Ce2O3,
- about 0.15 wt.-% to about 3.0 wt.-% Al2O3, and
- ZrO2 as balance.
2 more elements
A ceramic writing ball,
- wherein 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 a metal oxide selected from Y2O3, HfO, MgO, CaO and/or Ce2O3,
- about 0.15 wt.-% to about 0.35 wt.-% Al2O3, and
- ZrO2 as balance.
1 more element
Dependencies are inferred from the claim text.