US4552679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for deodorizing hypochlorite denture cleansing solutions and product containing a delayed release hypochlorite deactivator
Assignee: Warner Lambert Co LLC
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Filing: 1984-03-16
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Granted: 1985-11-12
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Expires: 2004-03-16
Abstract
Abstract A denture cleansing composition of the hypochlorite type is rendered substantially free of hypochlorite chlorine odor by incorporating into the composition a hypochlorite deactivator. The deactivator is released into the cleansing solution at a controlled rate to optimize cleansing efficacy at a reduced hypochlorite/chlorine odor. The deactivators suitable for use in this invention include sodium perborate monohydrate and sodium nitrite. The preferred method of controlling deactivator release rate is by encapsulating the deactivator.
Inventors
- 👤 Alexander M. Schobel
- 👤 Robert W. Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:17
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/02; A61K8/11; A61Q; A61Q11/00; A61Q11/02; A61K2800/00; A61K2800/20; A61K2800/22; A61K2800/222; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
46 words
An effervescent denture cleansing composition having two separate parts, comprising a fast dissolving effervescent first part having incorporated therein a cleansing agent comprising a hypochlorite generating agent and an effervescent second part slower disintegrating in water than the first part having incorporated therein a hypochlorite deactivator.
Claim 2
Dependent Claim
46 words
An effervescent denture cleansing composition having two separate parts, comprising a fast dissolving effervescent first part having incorporated therein a cleansing agent comprising a hypochlorite generating agent and an effervescent second part slower disintegrating in water than the first part having incorporated therein a hypochlorite deactivator.
Claim 3
Dependent Claim
14 words
The composition according to claim 1 wherein the hypochlorite generating agent is sodium dichloroisocyanurate.
Claim 4
Dependent Claim
21 words
The composition according to claim 1 wherein the hypochlorite deactivator is an alkali metal perborate, alkali metal nitrite, or ascorbic acid.
Claim 5
Dependent Claim
12 words
The composition according to claim 3 wherein the alkali metal is sodium.
Claim 6
Dependent Claim
13 words
The composition according to claim 3 wherein the deactivator is NaNO 2 .
Claim 7
Dependent Claim
30 words
The composition according to claim 1 wherein the second part has a controlled rate of disintegration said rate being controlled by incorporating therein a predetermined quantity of an effervescent agent.
Claim 8
Dependent Claim
46 words
The composition according to claim 6 wherein the effervescent agent is a mixture of an alkali metal bicarbonate and a water soluble organic acid said mixture comprising about 20% to about 40% (w/w) of the second part based on the total weight of the second part.
Claim 9
Dependent Claim
19 words
The composition according to claim 7 wherein the alkali metal is sodium and the organic acid is citric acid.
Claim 10
Dependent Claim
36 words
The composition according to claim 7 wherein the effervescent agent is an alkali metal perborate monohydrate comprising about 15% to about 20% (w/w) of the second part, based on the tablet weight of the second part.
Claim 11
Dependent Claim
12 words
The composition according to claim 9 wherein the alkali metal is sodium.
Claim 12
Dependent Claim
131 words
In a denture cleansing composition comprising a hypochlorite generating agent the improvement which comprises incorporating into the composition a hypochlorite deactivator said deactivator being slower releasing in water than the hypochlorite generating agent, and being encapsulated in a coating composition comprising a water insoluble film forming material and a plasticizer for the film forming composition said plasticizer being present in an amount from about 18% to about 40% (w/w) based on the film former solids, said coating composition being in an amount from about 6% to about 20% (w/w) of the encapsulated hydrochlorite deactivator, sufficient to control the release of deactivator into a solution of the denture cleansing composition at a rate sufficient to substantially reduce hypochlorite derived odor without substantial deleterious effect on the efficiency of the denture cleansing composition.
Claim 13
Dependent Claim
131 words
In a denture cleansing composition comprising a hypochlorite generating agent the improvement which comprises incorporating into the composition a hypochlorite deactivator said deactivator being slower releasing in water than the hypochlorite generating agent, and being encapsulated in a coating composition comprising a water insoluble film forming material and a plasticizer for the film forming composition said plasticizer being present in an amount from about 18% to about 40% (w/w) based on the film former solids, said coating composition being in an amount from about 6% to about 20% (w/w) of the encapsulated hydrochlorite deactivator, sufficient to control the release of deactivator into a solution of the denture cleansing composition at a rate sufficient to substantially reduce hypochlorite derived odor without substantial deleterious effect on the efficiency of the denture cleansing composition.
Claim 14
Dependent Claim
15 words
The composition according to claim 11 wherein the coating composition comprises ethylcellulose and dibutyl sebacate.
Claim 15
Dependent Claim
26 words
The composition according to claim 11 wherein the coating composition comprises about 14% to about 20% (w/w), based on the deactivator of the encapsulated hypochlorite deactivator.
Claim 16
Dependent Claim
26 words
The composition according to claim 11 wherein the coating composition comprises about 16% to about 20% (w/w) based on the deactivator, of the encapsulated hypochlorite deactivator.
Claim 17
Dependent Claim
23 words
The composition according to claim 11 wherein the coating composition comprises about 18% (w/w) based on the deactivator, of the encapsulated hypochlorite deactivator.
Claim 18
Dependent Claim
21 words
The composition according to claim 11 wherein the hypochlorite deactivator is an alkali metal perborate, alkali metal nitrite, or ascorbic acid.
Claim 19
Dependent Claim
14 words
The composition according to claim 13 wherein the hypochlorite deactivator is NaNO 2 .
Claim 20
Dependent Claim
12 words
The composition according to claim 16 wherein the alkali metal is sodium.
Claim 21
Dependent Claim
23 words
The composition according to claim 11 wherein the hypochlorite deactivator has a particle size range of about 20 mesh to about 50 mesh.
Claim 22
Dependent Claim
27 words
The composition according to claim 11 wherein the deactivator is included in the cleansing composition in a stoichiometric amount based on the amount of hypochlorite generating agent.
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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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |