Ink for ballpoint pens and ballpoint pen using same
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United States of America Patent
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Jul 8, 2014
Grant Date -
Nov 10, 2011
app pub date -
Jan 22, 2010
filing date -
Jan 23, 2009
priority date (Note) -
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Abstract
An ink composition for ballpoint pens comprises a coloring agent, a liquid medium, a polyoxyethylene castor oil and/or a polyoxyethylene hardened castor oil, or a derivative thereof, and one compound or a mixture of two or more compounds selected from the group consisting of a monoalkyl ether phosphoric acid, a polyoxyethylene monoalkyl ether phosphoric acid, a dialkyl ether phosphoric acid, a polyoxyethylene dialkyl ether phosphoric acid, a trialkyl ether phosphoric acid, and a polyoxyethylene trialkyl ether phosphoric acid.
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