Leak resistant writing instrument
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United States of America Patent
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May 16, 2006
Grant Date -
Jun 10, 2004
app pub date -
Dec 10, 2002
filing date -
Dec 10, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A writing instrument containing an ink reservoir, a writing medium, and a writing tip. Advantageously, a superabsorbent polymer can be associated with any writing instrument element or component, in order to absorb a writing medium to an extent sufficient to prevent abnormal or undesired leakage of the writing medium. The SAP can include, but is not limited to, polymers or copolymers preferably present at or near the surface of the writing instrument element or component in an amount such that the SAP does not substantially interfere with the desired communication or flow of the writing medium from the reservoir to the writing tip during normal use. Writing instruments according to the present invention should exhibit increased writing medium leak resistance.
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