Transparent or translucent tubular structure
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United States of America Patent
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Jun 1, 2004
Grant Date -
N/A
app pub date -
Feb 28, 2003
filing date -
Feb 28, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A writing medium reservoir that exhibits clear drain of a writing medium, and preferably in which the writing medium is readily visible to the user. A method of making a writing medium reservoir that exhibits clear drain of a writing medium, and preferably in which the writing medium is readily visible to the user. The method may include forming the writing medium reservoir by co-extruding an inner layer and an outer layer. In addition, the present invention relates to a multi-layer tubular structure that exhibits clear drain of a liquid, and preferably in which the relative presence or relative absence of liquid is readily visible to the user.
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