Patent US4532124A successfully refreshed from Google Patents.
US4532124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental rinse
Assignee: Development Finance Corp of New Zealand
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Filing: 1982-08-16
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Granted: 1985-07-30
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Expires: 2002-08-16
Abstract
Abstract The specification describes a dry composition and aqueous solution useful in the mineralization of dental plaque. The solution contains 0.01 to 50% W/V of a substance metabolized by bacteria in plaque (urea is exemplified) to raise the pH of said solution, a physiologically acceptable source of calcium ions and a physiologically acceptable source of phosphate ions, both in concentrations to form a stable solution with respect to a calcium phosphate salt, and optionally a fluoride ion generating compound metabolized by bacteria in plaque to release fluoride ions and/or a water soluble fluoride salt, the pH of the solution being from 1 to 9, and the pH and calcium and phosphate ion concentrations being such that the solution remains stable and with respect to the calcium phosphate salt until the substance is metabolized by bacteria in plaque. Results of some dental trials are presented.
Inventors
- 👤 Euan I. F. Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/24; A61K8/30; A61K8/40; A61K8/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
In the art or method of mineralizing dental plaque, the improvement consisting of the step of treating said plaque with a plaque mineralizing aqueous solution comprising 0.01 to 50% W/V of urea, a physiologically acceptable water-soluble fluoride salt, a physiologically acceptable water-soluble calcium salt and a physiologically acceptable water-soluble phosphate salt, the pH of the solution being from 1 to 9; said salts being present in concentrations such that the pH and fluoride, calcium and phosphate ion concentrations are such that the solution remains stable with respect to a calcium phosphate salt until said urea is metabolized by bacteria in plaque.
Claim 2
Dependent Claim
101 words
In the art or method of mineralizing dental plaque, the improvement consisting of the step of treating said plaque with a plaque mineralizing aqueous solution comprising 0.01 to 50% W/V of urea, a physiologically acceptable water-soluble fluoride salt, a physiologically acceptable water-soluble calcium salt and a physiologically acceptable water-soluble phosphate salt, the pH of the solution being from 1 to 9; said salts being present in concentrations such that the pH and fluoride, calcium and phosphate ion concentrations are such that the solution remains stable with respect to a calcium phosphate salt until said urea is metabolized by bacteria in plaque.
Claim 3
Dependent Claim
18 words
A method employing a solution according to claim 1, wherein said fluroide salt is also a phosphate salt.
Claim 4
Dependent Claim
36 words
A method employing a solution according to claim 1, wherein said fluoride salt is Na 2 PO 3 F present in a concentration such that the total fluoride concentration in the solution is about 5 mM.
Claim 5
Dependent Claim
18 words
A method employing a solution according to claim 1, wherein the pH is from about 4 to 5.
Claim 6
Dependent Claim
68 words
A method employing a solution according to claim 1 in the form of a mouth rinse which comprises an aqueous solution comprising 3% (W/V) urea, 20 mM calcium chloride, 12 mM sodium dihydrogen phosphate, 4.72 mM sodium monofluorophosphate, 0.28 mM sodium fluoride, 5% (V/V) glycerol, saccharine, spearmint and vanilla in amounts sufficient to increase palatability, and food color, said solution being adjusted to a pH of about 5.0.
Claim 7
Dependent Claim
61 words
A solution in the form of a mouth rinse which comprises an aqueous solution comprising 3% (V/V) urea, 20 mM calcium chloride, 12 mM sodium dihydrogen phosphate, 4.72 mM sodium monofluorophosphate, 0.28 mM sodium fluoride, 5% (v/v) glycerol, saccharine, spearmint and vanilla in amount sufficient to increase palatability, and food color, said solution being adjusted to a pH of about 5.0.
Claim 8
Dependent Claim
61 words
A solution in the form of a mouth rinse which comprises an aqueous solution comprising 3% (V/V) urea, 20 mM calcium chloride, 12 mM sodium dihydrogen phosphate, 4.72 mM sodium monofluorophosphate, 0.28 mM sodium fluoride, 5% (v/v) glycerol, saccharine, spearmint and vanilla in amount sufficient to increase palatability, and food color, said solution being adjusted to a pH of about 5.0.
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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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |