Drug – bio-affecting and body treating compositions – Dentifrices – Phosphate compound containing
Reexamination Certificate
2006-06-20
2006-06-20
Krass, Frederick (Department: 1614)
Drug, bio-affecting and body treating compositions
Dentifrices
Phosphate compound containing
C424S052000, C424S053000
Reexamination Certificate
active
07063833
ABSTRACT:
Disclosed are methods for reducing the staining of dentifrice composition containing stannous comprising administering to a subject the dentifrice composition. The dentifrice composition is a dual phase dentifrice and is contained in physically separated compartments of a dentifrice dispenser. The first dentifrice composition comprises an effective amount of one or more linear polyphosphates having an average chain length of about 4 or more and has a total water content of up to about 20%. The second dentifrice composition comprises an effective amount of stannous ions. The molar ratio of polyphosphate anion to stannous ion is from about 0.2:1 to about 5:1 and the efficacy of the stannous ion in the dentifrice is not reduced by the polyphosphate. The dentifrice composition may alternatively be a single phase dentifrice. The single phase dentifrice will comprise an effective amount of one or more linear polyphosphates having an average chain length of about 4 or more and an effective amount of a stannous ion. The single phase dentifrice has a total water content of up to about 20%, the stannous ion is not delivered from stannous fluoride, a molar ratio of polyphosphate anion to stannous ion is from about 0.2:1 to about 5:1, and the efficacy of the stannous ion in the dentifrice is not reduced by the polyphosphate.
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Bacca Lori Ann
Glandorf William Michael
Hiland Emelyn L.
Krass Frederick
The Procter & Gamble & Company
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