US5015408A
Expired / Lapsed
US
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Denture cleaning tablet containing a bleach activator and an organic phosphonic acid stabilizer
Assignee: RECKITT A GERMAN CORP GmbH
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Filing: 1989-03-15
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Granted: 1991-05-14
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Expires: 2009-03-15
Abstract
Abstract Cleaning tablet for the automatic cleaning of dentures in an aqueous solution, with a content of sodium hydrogen carbonate and/or sodium carbonate or carbonates, citric acid or citrate or citrates, sodium perborate, potassium monopersulphate, surfactants and foam forming agents, binders, lubricants and disintegrants, antimicrobial agents, carriers, flavoring/aromatizing substances, at least one perborate/peroxide activator and at least one phosphorus compound, characterized in that the activator content is between 0.5 and 3.0% by weight of the total composition of the cleaning tablet, is the phosphorus compound is includes at least one hydrolysis-stable organic phosphonic acid and/or a salt thereof that acts as a stabilizing agent and having a content between 0.5 and 3.0% by weight of the total composition of the cleaning tablet and that the total composition of the cleaning tablet is free from inorganic phosphates/polyphosphates and organic sequestrants based on aminocarboxylic acids and hydrophobic binders.
Inventors
- 👤 Mira Reuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:56
CPC Classifications
A; A61; A61Q; A61Q11/00; A61Q11/02; A61K; A61K8/00; A61K8/02; A61K8/0216; A61K8/18; A61K8/19; A61K8/22; A61K8/30; A61K8/40; A61K8/41; A61K8/55; C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0052; C11D3/39; C11D3/3902; A61K2800/00; A61K2800/20; A61K2800/22; A61K2800/222
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
223 words
A cleaning tablet for the automatic cleaning of dentures in an aqueous solution, including at least one compound chosen from the group consisting of: sodium carbonate and carbonates in an amount of approximately 10 to about 40 percent by weight, at least one compound chosen from the group consisting of: citric acid, citrate, and citrates in an amount of approximately 5 to about 20 percent by weight, sodium perborate in an amount of approximately 15 to about 30 percent by weight, potassium monopersulphate in an amount of approximately 10 to about 40 percent by weight, and including a content of surfactants and foam forming agents, binders, lubricants and disintegrants, antimicrobial agents, carriers, flavouring/aromatizing substances, and at least one perborate/peroxide activator and at least one phosphorus compound; the activator content being between approximately 0.5 to about 3.0% by weight of the total composition of the cleaning tablet, the phosphorus compound being exclusively at least one compound chosen from the group consisting of hydrolysis-stable organic phosphonic acid and salts thereof functioning as a stabilizing agent and being present in a content of between approximately 0.5 to about 3.0% by weight of the total composition of the cleaning tablet and the total composition of the cleaning tablet being free of any hydrophobic binder and being free from inorganic phosphates/polyphosphates and organic sequestrants based on aminocarboxylic acids.
Claim 2
Dependent Claim
223 words
A cleaning tablet for the automatic cleaning of dentures in an aqueous solution, including at least one compound chosen from the group consisting of: sodium carbonate and carbonates in an amount of approximately 10 to about 40 percent by weight, at least one compound chosen from the group consisting of: citric acid, citrate, and citrates in an amount of approximately 5 to about 20 percent by weight, sodium perborate in an amount of approximately 15 to about 30 percent by weight, potassium monopersulphate in an amount of approximately 10 to about 40 percent by weight, and including a content of surfactants and foam forming agents, binders, lubricants and disintegrants, antimicrobial agents, carriers, flavouring/aromatizing substances, and at least one perborate/peroxide activator and at least one phosphorus compound; the activator content being between approximately 0.5 to about 3.0% by weight of the total composition of the cleaning tablet, the phosphorus compound being exclusively at least one compound chosen from the group consisting of hydrolysis-stable organic phosphonic acid and salts thereof functioning as a stabilizing agent and being present in a content of between approximately 0.5 to about 3.0% by weight of the total composition of the cleaning tablet and the total composition of the cleaning tablet being free of any hydrophobic binder and being free from inorganic phosphates/polyphosphates and organic sequestrants based on aminocarboxylic acids.
Claim 3
Dependent Claim
16 words
The cleaning tablet of claim 1, wherein tetraacetyl ethylene diamine (TAED) is used as an activator.
Claim 4
Dependent Claim
28 words
The cleaning tablet of claim 1 wherein a pH-value of a cleaning liquid produced by dissolving the cleaning tablet in water is between approximately 7.6 to about 9.6.
Claim 5
Dependent Claim
26 words
The cleaning tablet of claim 1 wherein the phosphorus compound content of the total cleaning tablet composition is between approximately 0.5 to about 2.5% by weight.
Claim 6
Dependent Claim
63 words
The cleaning tablet of claim 1 wherein the tablet includes a dye system having at least two dyes, at least one of the dyes being present in a keto-form coloured with chromophoric groups and as a result of hydrogen ions released during cleaning with the tablet, changes into a colourless, desmotropic leucoenol form, and at least one of the dyes is a redox-neutral.
Claim 7
Dependent Claim
20 words
The cleaning tablet of claim 5 wherein the dye system includes a combination of sodium-indigotin disulphonate and sodium quinophthalone disulphonate.
Claim 8
Dependent Claim
32 words
The cleaning tablet of claim 5 wherein the content of the dye system with respect to the total composition of the cleaning tablet is between approximately 0.5 to about 0.35% by weight.
Claim 9
Dependent Claim
25 words
The cleaning tablet of claim 5 wherein the phosphorus compound content of the cleaning tablet composition is between approximately 0.5 to about 2.5% by weight.
Claim 10
Dependent Claim
153 words
A cleaning tablet for the automatic cleaning of dentures in an aqueous solution, including at least one compound chosen from the group consisting of sodium carbonate, and carbonates, in an amount of approximately 10 to about 40 percent by weight, at least one compound chosen from the group consisting of citric acid, citrate, and citrate, in an amount of approximately 15 to about 30 percent by weight monopersulphate in an amount of approximately 20 to about 40 percent by weight, and including a content of surfactants and foam forming agents, binders, lubricants and disintegrants, antimicrobial agents, carriers, aromatizing/flavouring substances, and including, a dye system having at least two dyes, at least one dye being present in a keto-form coloured with chromophoric groups and as a result of hydrogen ions released during cleaning with the cleaning tablet changes into a colourless, desmotropic leuco-enol form, and at least one of the dyes is a redox-neutral.
Claim 11
Dependent Claim
153 words
A cleaning tablet for the automatic cleaning of dentures in an aqueous solution, including at least one compound chosen from the group consisting of sodium carbonate, and carbonates, in an amount of approximately 10 to about 40 percent by weight, at least one compound chosen from the group consisting of citric acid, citrate, and citrate, in an amount of approximately 15 to about 30 percent by weight monopersulphate in an amount of approximately 20 to about 40 percent by weight, and including a content of surfactants and foam forming agents, binders, lubricants and disintegrants, antimicrobial agents, carriers, aromatizing/flavouring substances, and including, a dye system having at least two dyes, at least one dye being present in a keto-form coloured with chromophoric groups and as a result of hydrogen ions released during cleaning with the cleaning tablet changes into a colourless, desmotropic leuco-enol form, and at least one of the dyes is a redox-neutral.
Claim 12
Dependent Claim
20 words
The cleaning tablet of claim 3, wherein the dye system includes a combination of sodium-indigotin disulphonate and sodium quinophthalone disulphonate.
Claim 13
Dependent Claim
30 words
The cleaning tablet of claim 3 wherein the dye system content with respect to the total composition of the cleaning tablet is between approximately 0.05 to about 0.35% by weight.
Claim 14
Dependent Claim
28 words
The cleaning tablet of claim 3 wherein the pH-value of a cleaning liquid produced by dissolving the cleaning tablet in water is between approximately 7.6 to about 9.6.
Claim 15
Dependent Claim
14 words
The cleaning tablet of claim 3 wherein the cleaning tablet has a multilayer structure.
Claim 16
Dependent Claim
189 words
A composition for cleaning dentures in an aqueous solution comprising: at least one compound chosen from the group consisting of sodium hydrogen carbonate, sodium carbonate, and carbonates in an amount of approximately 10 to about 40 percent by weight; a least one compound chosen from the group consisting of citric acid, citrate, and citrates in an amount of approximately 5 to about 20 percent by weight; sodium perborate in an amount of approximately 15 to about 30 percent by weight; potassium monopersulphate in an amount approximately 20 to about 40 percent by weight; at least one perborate/peroxide activator in a content of approximately 0.5 to about 3.0 percent by weight of the total composition; at least one compound chosen from the group consisting of hydrolysis - stable organic phosphonic acid and salts thereof, being present in a content of approximately 0.5 to about 3.0 percent by weight of the total composition; a dye system including a keto-form coloured dye with chromophic groups and a redox-neutral dye; and the composition is free of any hydrophobic binders and does not include inorganic phosphates and organic sequestrants based on amino carboxylic acids.
Claim 17
Dependent Claim
189 words
A composition for cleaning dentures in an aqueous solution comprising: at least one compound chosen from the group consisting of sodium hydrogen carbonate, sodium carbonate, and carbonates in an amount of approximately 10 to about 40 percent by weight; a least one compound chosen from the group consisting of citric acid, citrate, and citrates in an amount of approximately 5 to about 20 percent by weight; sodium perborate in an amount of approximately 15 to about 30 percent by weight; potassium monopersulphate in an amount approximately 20 to about 40 percent by weight; at least one perborate/peroxide activator in a content of approximately 0.5 to about 3.0 percent by weight of the total composition; at least one compound chosen from the group consisting of hydrolysis - stable organic phosphonic acid and salts thereof, being present in a content of approximately 0.5 to about 3.0 percent by weight of the total composition; a dye system including a keto-form coloured dye with chromophic groups and a redox-neutral dye; and the composition is free of any hydrophobic binders and does not include inorganic phosphates and organic sequestrants based on amino carboxylic acids.
Claim 18
Dependent Claim
15 words
The cleaning composition of claim 14 wherein tetraacetyl ethylene diamine is used as an activator.
Claim 19
Dependent Claim
20 words
The cleaning composition of claim 14 wherein the dye system includes a combination of sodium-indigotin disulphonate and sodium quinophthalone disulphonate.
Claim 20
Dependent Claim
30 words
The cleaning composition of claim 14 wherein the dye system content with respect to the total composition of the cleaning tablet is between approximately 0.05 to about 0.35% by weight.
Claim 21
Dependent Claim
28 words
The cleaning composition of claim 14 wherein a pH-value of a cleaning liquid produced by dissolving the cleaning tablet in water is between approximately 7.6 to about 9.6.
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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) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |