US4198394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium dihydrogen phosphate enhanced dentifrice composition
Assignee: Individual
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Filing: 1979-02-12
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Granted: 1980-04-15
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Expires: 1999-02-12
Abstract
Abstract A sodium dihydrogen phosphate stannous fluoride containing dentifrice composition wherein the enamel penetration and effectiveness of the fluoride is enhanced by sodium dihydrogen phosphate causing the enamel crystalline latticework of the teeth to become activated and allowing the stannous fluoride to penetrate and remain in the tooth enamel for a sufficient period of time to render the enamel effectively resistant to the development of dental caries. The dentifrice also may include a carrier incorporating quantities of abrasive material for polishing, a sweetening agent, a flavoring agent and a foaming agent. Within the acid pH range of between 2 and 5 and preferably 3.5, the sodium dihydrogen phosphate compound alters the crystalline latticework of the enamel thus rendering it capable of inducing deep penetration of fluoride ions and, subsequent to fluoride penetration, a surface capping effect or sealing effect is developed by the stannous fluoride phosphate complex that is effectively resistant to the natural leaching effect of the oral fluids.
Inventors
- 👤 Frank R. Faunce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:18
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
203 words
A fluoride containing dentifrice composition having an acid phosphate enhanced fluoride system that penetrates and alters tooth enamel and is retained well in the enamel crystal latticework, said dentifrice being comprised of: a water free carrier; a quantity of an abrasive material from a group including insoluble sodium metaphosphate, dicalcium phosphate dihydrite and insoluble calcium pyrophosphate; a quantity of sweetening agent from a group consisting essentially of xylitol, sugar and sacharrin; a flavoring agent from a group consisting essentially of spearmint oil, citrus oils, fruit oils, vanilla oil, chocolate, grape and cinnamon; a quantity of stannous fluoride, said stannous fluoride compound being in the range of from 0.03% to 0.4% by weight of said dentifrice composition; and a quantity of sodium dihydrogen phosphate being incorporated within said carrier and adjusting the pH of the dentifrice composition to an acid range from about 2.5 to about 5.5 said sodium dihydrogen phosphate comprising from about 0.03% to about 0.4% by weight of said dentifrice composition and being capable of altering the crystalline latticework structure of tooth enamel during a toothbrushing sequence and reacting together with said stannous fluoride and providing a caries inhibiting fluorophosphate complex at the tooth surface energized by said sodium dihydrogen phosphate.
Claim 2
Dependent Claim
203 words
A fluoride containing dentifrice composition having an acid phosphate enhanced fluoride system that penetrates and alters tooth enamel and is retained well in the enamel crystal latticework, said dentifrice being comprised of: a water free carrier; a quantity of an abrasive material from a group including insoluble sodium metaphosphate, dicalcium phosphate dihydrite and insoluble calcium pyrophosphate; a quantity of sweetening agent from a group consisting essentially of xylitol, sugar and sacharrin; a flavoring agent from a group consisting essentially of spearmint oil, citrus oils, fruit oils, vanilla oil, chocolate, grape and cinnamon; a quantity of stannous fluoride, said stannous fluoride compound being in the range of from 0.03% to 0.4% by weight of said dentifrice composition; and a quantity of sodium dihydrogen phosphate being incorporated within said carrier and adjusting the pH of the dentifrice composition to an acid range from about 2.5 to about 5.5 said sodium dihydrogen phosphate comprising from about 0.03% to about 0.4% by weight of said dentifrice composition and being capable of altering the crystalline latticework structure of tooth enamel during a toothbrushing sequence and reacting together with said stannous fluoride and providing a caries inhibiting fluorophosphate complex at the tooth surface energized by said sodium dihydrogen phosphate.
Claim 3
Dependent Claim
27 words
A fluoride and acid phosphate containing dentifrice composition as recited in claim 1, wherein: said acid phosphate adjusts the pH of said dentifrice composition to about 3.5.
Claim 4
Dependent Claim
36 words
A fluoride and acid phosphate containing dentifrice composition as recited in claim 1, wherein: the ratios of said fluoride containing compound and said acid phosphate in said dentifrice compound are of substantially equal proportion by weight.
Claim 5
Dependent Claim
40 words
A fluoride and acid phosphate containing dentifrice composition as recited in claim 1, wherein: said stannous fluoride comprises about 0.4% of said dentifrice composition by weight; and said sodium dihydrogen phosphate comprises about 0.4% of said dentifrice composition by weight.
Claim 6
Dependent Claim
63 words
A fluoride and acid phosphate containing dentifrice as recited in claim 1, wherein said carrier is a water free gel carrier comprising: a quantity of glycerin in the range of from about 5% to about 50% of said dentifrice composition by weight; and a quantity of carboxymethylcellulose in the range of from about 10% to about 75% of said dentifrice composition by weight.
Claim 7
Dependent Claim
136 words
In a dentifrice composition that is acceptable for daily use in the maintenance of oral hygiene and which incorporates a water-free carrier, abrasive material, sweetening agent, flavoring agent and a foaming agent, the improvement comprising: a quantity of stannous fluoride having a fluoride concentration in the range of from about 0.03% to 0.4% by weight of said dentifrice composition; and a quantity of sodium dihydrogen phosphate sufficient to adjust the pH of said dentifrice composition to a pH range of between 2.5 and 5, said sodium dihydrogen phosphate and stannous fluoride reacting with the enamel of the teeth during a tooth brushing sequence to activate the crystalline latticework of the enamel and promote enhanced penetration of the fluoride into the enamel, thus developing a caries inhibiting fluorophosphate complex within the crystalline latticework of the tooth enamel.
Claim 8
Dependent Claim
136 words
In a dentifrice composition that is acceptable for daily use in the maintenance of oral hygiene and which incorporates a water-free carrier, abrasive material, sweetening agent, flavoring agent and a foaming agent, the improvement comprising: a quantity of stannous fluoride having a fluoride concentration in the range of from about 0.03% to 0.4% by weight of said dentifrice composition; and a quantity of sodium dihydrogen phosphate sufficient to adjust the pH of said dentifrice composition to a pH range of between 2.5 and 5, said sodium dihydrogen phosphate and stannous fluoride reacting with the enamel of the teeth during a tooth brushing sequence to activate the crystalline latticework of the enamel and promote enhanced penetration of the fluoride into the enamel, thus developing a caries inhibiting fluorophosphate complex within the crystalline latticework of the tooth enamel.
Claim 9
Dependent Claim
48 words
The improvement of claim 6, wherein said dentifrice composition includes: stannous fluoride and sodium dihydrogen phosphate within a predetermined pH range that is sufficient to induce tin microsealing of the enamel surface after penetration of the fluoride and sodium dihydrogen phosphate into the crystalline latticework of the enamel.
Claim 10
Dependent Claim
104 words
In a dentifrice composition that is acceptable for daily use in the maintenance of oral hygiene and which incorporates a carrier agent incorporating an abrasive material, sweetening agent, flavoring agent and a foaming agent, the improvement comprising: a quantity of sodium dihydrogen phosphate being incorporated into said dentifrice composition in sufficient amount to adjust the pH of said dentifrice composition to a pH range of from about 2.0 to about 5, said sodium dihydrogen phosphate reacting with the enamel of the teeth during a toothbrushing sequence to modify the crystalline latticework of the enamel to render it resistant to the development of the caries.
Claim 11
Dependent Claim
104 words
In a dentifrice composition that is acceptable for daily use in the maintenance of oral hygiene and which incorporates a carrier agent incorporating an abrasive material, sweetening agent, flavoring agent and a foaming agent, the improvement comprising: a quantity of sodium dihydrogen phosphate being incorporated into said dentifrice composition in sufficient amount to adjust the pH of said dentifrice composition to a pH range of from about 2.0 to about 5, said sodium dihydrogen phosphate reacting with the enamel of the teeth during a toothbrushing sequence to modify the crystalline latticework of the enamel to render it resistant to the development of the caries.
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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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |