Patent US4816494A successfully refreshed from Google Patents.
Patent US4540576A successfully refreshed from Google Patents.
US4540576A
Expired / Lapsed
US
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Neutral topical sodium fluoride gel
Assignee: Dentsply Research and Development Corp
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Filing: 1984-01-24
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Granted: 1985-09-10
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Expires: 2004-01-24
Abstract
Abstract A neutral topical sodium fluoride gel is disclosed which comprises a thickened aqueous solution of sodium fluoride buffered to maintain a pH of from about 6 to 8, wherein the thickener is a mixture of xanthan gum and a soluble salt of an acrylic acid polymer.
Inventors
- 👤 Robert T. Zahradnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:13
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K6/00; A61K6/60; A61K6/65; A61K6/66; A61K6/69; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/72; A61K8/73; A61K8/81; A61K8/8141; A61K8/8147; A61K2800/00; A61K2800/40; A61K2800/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A thickened sodium fluoride aqueous composition suitable for use in the topical prophylactic treatment of the teeth, said composition consisting essentially of from about 75.2 to about 96.1 weight percent water, sodium fluoride in a proportion of from about 1 to about 5 weight percent of the total composition, and thickener, wherein the pH of the composition is within the range of from about 6 to about 8, and wherein the thickener consists essentially of xanthan gum and a water soluble salt of an acylic acid polymer.
Claim 2
Dependent Claim
87 words
A thickened sodium fluoride aqueous composition suitable for use in the topical prophylactic treatment of the teeth, said composition consisting essentially of from about 75.2 to about 96.1 weight percent water, sodium fluoride in a proportion of from about 1 to about 5 weight percent of the total composition, and thickener, wherein the pH of the composition is within the range of from about 6 to about 8, and wherein the thickener consists essentially of xanthan gum and a water soluble salt of an acylic acid polymer.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said composition contains a buffering agent.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein said composition includes flavoring agents, preservatives, and coloring agents.
Claim 5
Dependent Claim
17 words
The composition of claim 2 wherein the buffering agent is disodium phosphate, monosodium phosphate, or mixture thereof.
Claim 6
Dependent Claim
53 words
The composition of claim 1, 2, 3, or 4 wherein said composition has a viscosity of from about 40 to about 200 poises tested by a Brookfield viscometer at 60 RPM and 25° C., and a viscosity of 500 to 4000 poises tested by a Brookfield viscometer at 1.5 RPM and 25° C.
Claim 7
Dependent Claim
18 words
The composition of claim 5 wherein the thickener is xanthan gum plus the sodium salt of polyacrylic acid.
Claim 8
Dependent Claim
48 words
A method for treating teeth to help control dental caries which comprises applying an effective amount of the composition of claim 1 to the surface of teeth to be treated, and leaving said composition in contact with the teeth for a period of time sufficient to effect treatment.
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |