US4485089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gel toothpastes
Assignee: Aqualon Co
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Filing: 1983-10-17
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Granted: 1984-11-27
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Expires: 2003-10-17
Abstract
Abstract Disclosed are transparent dentifrice compositions comprising a humectant, a vehicle for the humectant, a finely divided dental abrasive, a silica thickener, and a hydrophobically modified hydroxyethyl cellulose thickening and gelling agent.
Inventors
- 👤 Dianne P. Leipold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:38
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/19; A61K8/25; A61K8/30; A61K8/33; A61K8/34; A61K8/345; A61K8/72; A61K8/73; A61K8/731; A61Q; A61Q11/00; A61K2800/00; A61K2800/20; A61K2800/26; A61K2800/262
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
99 words
A transpartent dentifrice composition consisting essentially of: (a) a mixture containing from about 80% to about 90% of a humectant and from about 10% to about 20% of a suitable vehicle for the humectant; (b) from about 5% to about 50% of a finely divided dental abrasive; (c) from about 1% to about 10% of a silica thickener; and (d) from about 0.1% to about 0.4% of a hydrophobically modified hydroxyethyl cellulose which is hydrophobically modified with a hydrocarbon radical having 8 to 25 carbon atoms and which has a hydroxyethyl M.S. of from about 2.5 to about 3.5.
Claim 2
Dependent Claim
99 words
A transpartent dentifrice composition consisting essentially of: (a) a mixture containing from about 80% to about 90% of a humectant and from about 10% to about 20% of a suitable vehicle for the humectant; (b) from about 5% to about 50% of a finely divided dental abrasive; (c) from about 1% to about 10% of a silica thickener; and (d) from about 0.1% to about 0.4% of a hydrophobically modified hydroxyethyl cellulose which is hydrophobically modified with a hydrocarbon radical having 8 to 25 carbon atoms and which has a hydroxyethyl M.S. of from about 2.5 to about 3.5.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein the hydrocarbon radical is present in an amount from about 0.1 to about 0.9%.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein the humectant is selected from the group consisting of glycerin, sorbitol, propylene glycol and mixtures thereof.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein a suitable vehicle for the humectant is water.
Claim 6
Dependent Claim
22 words
The composition of claim 1 wherein the finely divided dental abrasive is a high silica content material of at least 70% silica.
Claim 7
Dependent Claim
34 words
The composition of claim 5 wherein the silica has a particle size from about 2 to about 20 microns, and a refractive index which is substantially the same as the humectant and vehicle mixture.
Claim 8
Dependent Claim
26 words
The composition of claim 1 wherein the silica thickener is selected from the group consisting of silica aerogel, dehydrated silica hydrogel, precipitated silica, and pyrogenic silica.
Claim 9
Dependent Claim
22 words
The composition of claim 1 wherein the hydrophobically modified hydroxyethyl cellulose is present in an amount from about 0.2% to about 0.3%.
Claim 10
Dependent Claim
22 words
The composition of claim 1 which further comprises a polyethylene glycol having a molecular weight of from about 300 to about 20,000.
Claim 11
Dependent Claim
19 words
The composition of claim 9 wherein the polyethylene glycol is present in an amount of 1% to about 5%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |