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Patent US4902497A successfully refreshed from Google Patents.
US4902497A
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Oral compositions
Assignee: Procter and Gamble Co
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Filing: 1988-03-01
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Granted: 1990-02-20
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Expires: 2008-03-01
Abstract
Abstract Methods for reducing calculus are disclosed utilizing oral compositions containing stannous ions complexed with certain carboxylic acids or polyhydric alcohols.
Inventors
- 👤 Mark M. Crisanti
- 👤 Anthony C. Lanzalaco
- 👤 Richard J. Sunberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:01
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/30; A61K8/33; A61K8/34; A61K8/345; A61K8/36; A61K8/365
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A method effective in reducing calculus comprising applying to dental enamel of subjects susceptible of forming calculus a safe and effective amount of a toothpaste composition containing: (a) at least 1000 ppm stannous ions from stannous chloride; (b) a mono or di carboxylic acid or polyhydric alcohol complexing agent having an equilibrium binding constant for stannous of less than about 10 5 which is gluconic acid or a water soluble salt thereof; (c) an acceptable toothpaste carrier; wherein the pH of said composition is from about 3.5 to about 7.0.
Claim 2
Independent Claim
90 words
A method effective in reducing calculus comprising applying to dental enamel of subjects susceptible of forming calculus a safe and effective amount of a toothpaste composition containing: (a) at least 1000 ppm stannous ions from stannous chloride; (b) a mono or di carboxylic acid or polyhydric alcohol complexing agent having an equilibrium binding constant for stannous of less than about 10 5 which is gluconic acid or a water soluble salt thereof; (c) an acceptable toothpaste carrier; wherein the pH of said composition is from about 3.5 to about 7.0.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein the stannous ion concentration is from about 1000 to about 2500 ppm.
Claim 4
Dependent Claim
15 words
A method according to claim 2 wherein the toothpaste also contains a silica dental abrasive.
Claim 5
Dependent Claim
15 words
A method according to claim 3 wherein the toothpaste also contains a fluoride ion source.
Claim 6
Dependent Claim
14 words
A method according to claim 4 wherein the fluoride ion source is stannous fluoride.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |