Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Implant or insert
Reexamination Certificate
2005-09-20
2005-09-20
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Implant or insert
C424S049000, C424S053000, C424S401000, C424S443000, C424S447000, C424S448000, C424S449000
Reexamination Certificate
active
06946142
ABSTRACT:
The present invention relates to a dry type teeth whitening patch with a multi-layer structure of three or more layers. More particularly, in the dry type patch, a contact adhesive layer substantially free of peroxide comprises a hydrophilic glass polymer as a base polymer so that it provides substantial adhesive strength when hydrated by water, an active material reservoir layer comprises peroxide as a teeth whitening agent, and a backing layer which is impermeable to water. The dry type patch of the present invention has superior teeth whitening effect and excellent peroxide stability at a high temperature since the peroxide-containing layer is covered and protected by other layers.
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patent:
Chang Sug-Youn
Kim Ji-Young
Kim Jong-Ho
Yun Sei-Young
Fox Rothschild LLP
Krass Frederick
LG Household & Healthcare Ltd.
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