Drug – bio-affecting and body treating compositions – Dentifrices – Oxygen or chlorine releasing compound containing
Reexamination Certificate
2011-01-04
2011-01-04
Krass, Frederick (Department: 1612)
Drug, bio-affecting and body treating compositions
Dentifrices
Oxygen or chlorine releasing compound containing
C424S049000, C424S401000, C424S435000, C424S443000, C424S448000, C424S449000, C433S216000, C433S217100
Reexamination Certificate
active
07862801
ABSTRACT:
A dental bleaching composition comprises a dental bleaching agent and a polyvinylpyrrolidone thickening agent. The bleaching composition may include water, flavoring agents, a basic substance and desensitizing agents, as desired. Polyvinylpyrrolidone avoids acid etching and chelation of teeth that were problematic in bleaches using carbomer as a thickener. A delivery system for delivering the bleaching composition comprises the aforementioned dental bleaching composition in combination with a moisture-resistant barrier layer such as a dental tray or a flexible strip of material.
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Krass Frederick
Roberts Lezah W
Ultradent Products Inc.
Workman Nydegger
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