US4024239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothpaste composition
Assignee: Lever Brothers Co
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Filing: 1975-07-03
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Granted: 1977-05-17
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Expires: 1995-07-03
Abstract
Abstract A toothpaste composition offering an improved luster to tooth enamel, comprising a mixture of alpha alumina trihydrate and precipitated amorphous silica in combination with a minor amount of anhydrous dicalcium phosphate or dicalcium phosphate dihydrate as a stabilizer.
Inventors
- 👤 Morton Pader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:18
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61K8/25; A61K8/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A toothpaste composition for incorporation into an uncoated aluminum tube that provides an improved luster to tooth enamel comprising a. from 10% to 30% of alpha alumina trihydrate having an average particle size of from about 6.5 to about 8.5 microns; b. from 10% to 20% of a precipitated amorphous silica having a low abrasive capacity; and c. a stabilizing agent of about 1 to 5% dicalcium phosphate dihydrate or about 0.5 to 2% anhydrous dicalcium phosphate; said stabilizing agents being effective to stabilize components (a) and (b) against corrosion of uncoated aluminum tubes.
Claim 2
Dependent Claim
94 words
A toothpaste composition for incorporation into an uncoated aluminum tube that provides an improved luster to tooth enamel comprising a. from 10% to 30% of alpha alumina trihydrate having an average particle size of from about 6.5 to about 8.5 microns; b. from 10% to 20% of a precipitated amorphous silica having a low abrasive capacity; and c. a stabilizing agent of about 1 to 5% dicalcium phosphate dihydrate or about 0.5 to 2% anhydrous dicalcium phosphate; said stabilizing agents being effective to stabilize components (a) and (b) against corrosion of uncoated aluminum tubes.
Claim 3
Dependent Claim
29 words
A toothpaste composition in accordance with claim 1 wherein the alpha alumina trihydrate is present in an amount of from 20 to 25% by weight of the total composition.
Claim 4
Dependent Claim
30 words
A toothpaste composition in accordance with claim 2 wherein the precipitated amorphous silica is present in a range from 10 to 15% based on the total weight of the composition.
Claim 5
Dependent Claim
40 words
A toothpaste composition in accordance with claim 3 wherein the stabilizing agent is dicalcium phosphate dihydrate said stabilizing agent being present in an amount of from about 1 to 2% by weight, based on the total weight of the composition.
Claim 6
Dependent Claim
39 words
A toothpaste composition in accordance with claim 3 wherein the stabilizing agent is anhydrous dicalcium phosphate, said stabilizing agent being present in an amount of from 1 to 1.5% by weight based on the total weight of the composition.
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |