US4343786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrices containing alpha-alumina trihydrate
Assignee: Colgate Palmolive Co
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Filing: 1980-04-24
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Granted: 1982-08-10
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Expires: 2000-04-24
Abstract
Abstract Toothpaste containing abrasive particles of milled alpha-alumina trihydrate, alkali metal monofluorophosphate and alkali metal fluoride, the total fluoride corresponding to about 500 to 1000 ppm F, which toothpaste is compatible with an unlined aluminum container and is effective to reduce enamel solubility.
Inventors
- 👤 Eric Baines
- 👤 John F. Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
A toothpaste characterized in that the toothpaste contains abrasive particles of milled alpha-alumina trihydrate, alkali metal monofluorophosphate and alkali metal fluoride, the mol ratio of said monofluorophosphate to said alkali metal fluoride being about 1.5:1 to 5:1 the total amount of said monofluorophosphate and fluoride corresponding to about 500 to 1500 ppm F, and said alpha-alumina trihydrate being reactive with said alkali metal fluoride.
Claim 2
Dependent Claim
64 words
A toothpaste characterized in that the toothpaste contains abrasive particles of milled alpha-alumina trihydrate, alkali metal monofluorophosphate and alkali metal fluoride, the mol ratio of said monofluorophosphate to said alkali metal fluoride being about 1.5:1 to 5:1 the total amount of said monofluorophosphate and fluoride corresponding to about 500 to 1500 ppm F, and said alpha-alumina trihydrate being reactive with said alkali metal fluoride.
Claim 3
Dependent Claim
22 words
A toothpaste as in claim 1 in which the average particle size of milled alpha-alumina trihydrate is about 2 to 15 microns.
Claim 4
Dependent Claim
18 words
A toothpaste as in claim 2 in which said total amount is at least about 800 ppm F.
Claim 5
Dependent Claim
16 words
A toothpaste as in claim 3 in which said mol ratio is about 1.5:1 to 1.3:1.
Claim 6
Dependent Claim
23 words
A toothpaste as in claim 4 in which said alkali metal monofluorophosphate is sodium monofluorophosphate and said alkali metal fluoride is sodium fluoride.
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) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |