United States Patent Number 5,941,256
August 24, 1999
Source
Dental hygiene article
Patent Abstract
A dental hygiene article, including a dental floss, and a microcapsule associated
with a portion of the floss. The microcapsule includes a pigment encapsulated
within the microcapsule for changing the color of a portion of the floss associated
with the microcapsule upon rupture of the microcapsule as an indication of
use or release of an active agent.
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