US3957967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agent for the care and the cleaning of teeth and dentures
Assignee: Blendax GmbH
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Filing: 1974-07-01
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Granted: 1976-05-18
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Expires: 1994-07-01
Abstract
Abstract Disclosed are compositions for the care and the cleaning of human teeth and dentures containing 1,6-di-4'-chlorophenyldiguanidohexane ("chlorohexidine") or the salts thereof and an amount of urea sufficient to reduce brown staining or discoloring of the teeth caused by the chlorohexidine. Also disclosed is a method of treating teeth and dentures comprising contacting them with urea and chlorohexidine.
Inventors
- 👤 Paul L'Orange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:29
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/42; A61K8/43; A61Q11/02; A61K2800/00; A61K2800/40; A61K2800/52
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A dental care composition comprising 1,6-di-4' -chlorophenyldiguanidohexane or the non-toxic salts thereof in an amount of between about 0.01 and about 25 percent by weight of the composition based on free 1,6-di-4'-chlorophenyldiguanidohexane and urea, the amount of urea being sufficient to reduce the tendency of the 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof to cause discoloration of the teeth, tongue or dentures and in an amount of between about 5.0 and about 45 percent by weight of the composition.
Claim 2
Dependent Claim
76 words
A dental care composition comprising 1,6-di-4' -chlorophenyldiguanidohexane or the non-toxic salts thereof in an amount of between about 0.01 and about 25 percent by weight of the composition based on free 1,6-di-4'-chlorophenyldiguanidohexane and urea, the amount of urea being sufficient to reduce the tendency of the 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof to cause discoloration of the teeth, tongue or dentures and in an amount of between about 5.0 and about 45 percent by weight of the composition.
Claim 3
Dependent Claim
36 words
The dental care composition according to claim 1 wherein the 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof are present in an amount of between about 0.01 and about 7.5 percent by weight of the composition based on free 1,6-di-4'-chlorophenyldiguanidohexane.
Claim 4
Dependent Claim
37 words
The dental care composition according to claim 1 containing a non-toxic carrier substance selected from the group consisting of a polishing agent, a binding and thickening agent, a moisture-holding agent, a surface active agent and mixtures thereof.
Claim 5
Dependent Claim
32 words
The dental care composition according to claim 3 in the form of a paste, a powder, a transparent gel, an aqueous solution, an alcoholic solution, a tablet, a dragee or chewing gum.
Claim 6
Dependent Claim
19 words
The dental care composition according to claim 3 wherein the 1,6-di-4'-chlorophenyldiguanidohexane is present as its diacetate or digluconate salt.
Claim 7
Dependent Claim
17 words
The dental care composition according to claim 3 in the form of a cleaning agent for dentures.
Claim 8
Dependent Claim
52 words
The dental care composition according to claim 1 wherein the amount of 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof is between about 0.5 and about 25 percent by weight of the composition based on free 1,6-di-4'-chlorophenyldiguanidohexane and the composition is in the form of a tablet or powder for use as a denture cleaning agent.
Claim 9
Dependent Claim
57 words
The dental care composition according to claim 1 wherein the 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof is present in an amount of about 0.05 to about 5 percent by weight of the composition based on free 1,6-di-4'-chlorophenyldiguanidohexane and the composition is in the form of a solution, a paste or a gel for use as a denture cleaning agent.
Claim 10
Independent Claim
67 words
A method for treating teeth comprising contacting the teeth with 1,6-di-4'-chlorophenyldiguanidohexane or the salts thereof in an amount sufficient to prevent or remove dental plaque and with a composition containing urea in an amount sufficient to reduce the tendency of the 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof to cause discoloration of the teeth and in an amount of between about 5.0% and about 45% by weight of said composition.
Claim 11
Independent Claim
67 words
A method for treating teeth comprising contacting the teeth with 1,6-di-4'-chlorophenyldiguanidohexane or the salts thereof in an amount sufficient to prevent or remove dental plaque and with a composition containing urea in an amount sufficient to reduce the tendency of the 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof to cause discoloration of the teeth and in an amount of between about 5.0% and about 45% by weight of said composition.
Claim 12
Dependent Claim
65 words
The method according to claim 9 wherein the teeth are first treated with a composition containing about 5 to about 45 percent by weight of the composition of urea and an anionic surface active agent and subsequently the teeth are treated with a composition containing about 0.01 to about 7.5 percent by weight of the composition of 1,6-di-4'-chlorophenyldiguanidohexane or salts thereof based on free 1,6-di-4'-chlorophenyldiguanidohexane.
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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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |