US4839157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable hydrogen peroxide dental gel containing fumed silicas
Assignee: Colgate Palmolive Co
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Filing: 1988-09-12
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Granted: 1989-06-13
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Expires: 2008-09-12
Abstract
Abstract A stable aqueous hydrogen peroxide gel dentifrice for oral anti-gingivitis application having an acid pH of about 3-6 comprising a combination of hydrophilic and hydrophobic fumed silica gelling agent, hydrogen peroxide, about 20-40% by weight of a polyethylene glycol humectant, flavor, sweetening agent, sodium benzoate, and a nonionic surfactant as the essential ingredients, prepared by a process which comprises controlling the order of addition of the essential ingredients. Distilled (deionized) water is preferred in the formulation to prevent minimal contamination.
Inventors
- 👤 Shirley Mei-King Ng
- 👤 Denise-Marie DiTomasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:18
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/19; A61K8/22; A61K8/25; A61K8/30; A61K8/33; A61K8/39
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A stable aqueous hydrogen peroxide dental gel comprisisng about 1.5-3.5% by weight hydrogen peroxide as the sole chemically active agent, a combination of hydrophilic and hydrophobic fumed silica gelling agents, about 20 to 40% by weight of a polyethylene glycol humectant, a nonionic surfactant, sweetening agent, sodium benzoate and a flavor, said gel having an acid pH of about 3-6.
Claim 2
Dependent Claim
60 words
A stable aqueous hydrogen peroxide dental gel comprisisng about 1.5-3.5% by weight hydrogen peroxide as the sole chemically active agent, a combination of hydrophilic and hydrophobic fumed silica gelling agents, about 20 to 40% by weight of a polyethylene glycol humectant, a nonionic surfactant, sweetening agent, sodium benzoate and a flavor, said gel having an acid pH of about 3-6.
Claim 3
Dependent Claim
30 words
The dental gel according to claim 1 wherein the hydrophilic fumed silica constitutes about 8-10% by weight and the hydrophobic fumed silica constitutes about 0.5-1.5% by weight of the composition.
Claim 4
Dependent Claim
22 words
The dental gel according to claim 2, wherein the sweetening agent is sodium saccharing in an amount of about 0.2-1% by weight.
Claim 5
Dependent Claim
19 words
The dental gel according to claim 3, wherein the nonionic surfactant constitutes about 0.5-5% by weight of the composition.
Claim 6
Dependent Claim
26 words
The dental gel according to claim 4, wherein the nonionic surfactant is a polyoxyethylene monoester of sorbitol with a C 10 to C 18 fatty acid.
Claim 7
Dependent Claim
19 words
The dental gel according to claim 4, wherein the aqueous content constitutes about 20-40% by weight of deionized water.
Claim 8
Dependent Claim
16 words
The dental gel according to claim 6, wherein the flavor content is about 0.5-2% by weight.
Claim 9
Dependent Claim
16 words
The dental gel according to claim 5 wherein the nonionic surfactant is polyethylene (20) sorbitan monolaurate.
Claim 10
Dependent Claim
21 words
The dental gel according to claim 7 wherein the sodium benzoate constitutes about 0.35 to 0.5% by weight of the composition.
Claim 11
Dependent Claim
13 words
The dental gel according to claim 2 having a pH of abou 4.5-5.
Claim 12
Dependent Claim
19 words
The dental gel according to claim 1, wherein the polyethylene glycol has an average molecular weight of about 200-1000.
Claim 13
Dependent Claim
18 words
The dental gel according to claim 11, wherein the molecular weight of the polyethylene glycol is about 400-600.
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |