US4425323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smooth dental cream
Assignee: Colgate Palmolive Co
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Filing: 1983-03-28
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Granted: 1984-01-10
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Expires: 2003-03-28
Abstract
Abstract A dental cream containing high viscosity hydroxyethyl cellulose gelling agent, a calcium phosphate polishing agent and a binary source of fluorine of sodium fluoride and sodium monofluorophosphate.
Inventors
- 👤 Anthony J. Morton
- 👤 Kenneth Harvey
- 👤 Hermann Gutenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/24; A61K8/72; A61K8/73; A61K8/731; A61Q; A61Q11/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A dental cream which does not form a tail upon extrusion comprising a binary fluorine source of a mixture of sodium monofluorophosphate and sodium fluoride in which about 30-40% by weight of said fluorine is from said sodium fluoride, in amount to provide about 750-2000 ppm total of ionic fluorine, about 35-75% by weight of a polishing agent consisting essentially of a calcium phosphate and a dental vehicle comprising about 20-80% by weight based on the weight of the dental cream of a liquid phase containing water, humectant or mixture thereof and about 0.5-5% by weight based on the weight of the dental cream of a gelling agent consisting essentially of hydroxyethyl cellulose having a viscosity in a range the average of which is at least, about 24,000 cps, determined on a Brookfield viscometer in 2% water:glycerine (1:1.56) aqueous solution at 20° C., with a No. 6 spindle at 20 rpm.
Claim 2
Dependent Claim
151 words
A dental cream which does not form a tail upon extrusion comprising a binary fluorine source of a mixture of sodium monofluorophosphate and sodium fluoride in which about 30-40% by weight of said fluorine is from said sodium fluoride, in amount to provide about 750-2000 ppm total of ionic fluorine, about 35-75% by weight of a polishing agent consisting essentially of a calcium phosphate and a dental vehicle comprising about 20-80% by weight based on the weight of the dental cream of a liquid phase containing water, humectant or mixture thereof and about 0.5-5% by weight based on the weight of the dental cream of a gelling agent consisting essentially of hydroxyethyl cellulose having a viscosity in a range the average of which is at least, about 24,000 cps, determined on a Brookfield viscometer in 2% water:glycerine (1:1.56) aqueous solution at 20° C., with a No. 6 spindle at 20 rpm.
Claim 3
Dependent Claim
20 words
The dental cream claimed in claim 1 wherein said gelling agent is present in amount of about 0.8-2% by weight.
Claim 4
Dependent Claim
19 words
The dental cream claimed in claim 1 wherein said binary fluorine source provides about 1400-2000 ppm of ionic fluorine.
Claim 5
Dependent Claim
22 words
The dental cream claimed in claim 1 wherein dicalcium phosphate is present as polishing agent in amount of about 40-75% by weight.
Claim 6
Dependent Claim
25 words
The dental cream claimed in claim 1 wherein said hydroxyethyl cellulose is a grade having a viscosity of about 17,000-31,000; about 37,000-41,000 or about 20,000-30,000.
Claim 7
Dependent Claim
17 words
The dental cream claimed in claim 5 wherein said hydroxyethyl cellulose has a viscosity of about 20,000-30,000.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |