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US4193987A
Expired / Lapsed
US
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Non-corrosive toothpaste
Assignee: Blendax GmbH
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Filing: 1978-12-20
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Granted: 1980-03-18
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Expires: 1998-12-20
Abstract
Abstract The corrosive effect of toothpaste on aluminum is prevented by incorporating in the toothpaste about 0.05% to about 5% by weight of a synthetic alkali metal aluminum silicate zeolite. Toothpaste containing a zeolite of the empirical formula Na 12 (AlO 2 ) 12 .(SiO 2 ) 12 .27H 2 O is particularly useful.
Inventors
- 👤 Helmut Harth
- 👤 Dieter Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:13
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61Q; A61Q11/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A non-corrosive aqueous-based toothpaste composition comprising about 0.05% to about 5% by weight of an anticorrosive additive which inhibits toothpaste corrosion of aluminum, said additive being a synthetic alkali metal aluminum silicate zeolite of the formula x(M.AlO.sub.2).ySiO.sub.2.zH.sub.2 O wherein M is alkali metal or ammonium, X is a number from 1 to 64, y is a number dependent on X with the determination of y being one-fold to six-fold of X, and Z is a number from 0 to 256.
Claim 2
Dependent Claim
80 words
A non-corrosive aqueous-based toothpaste composition comprising about 0.05% to about 5% by weight of an anticorrosive additive which inhibits toothpaste corrosion of aluminum, said additive being a synthetic alkali metal aluminum silicate zeolite of the formula x(M.AlO.sub.2).ySiO.sub.2.zH.sub.2 O wherein M is alkali metal or ammonium, X is a number from 1 to 64, y is a number dependent on X with the determination of y being one-fold to six-fold of X, and Z is a number from 0 to 256.
Claim 3
Dependent Claim
10 words
The non-corrosive toothpaste of claim 1 wherein M is sodium.
Claim 4
Dependent Claim
19 words
The non-corrosive toothpaste of claim 2 wherein the additive is a zeolite of the empirical formula Na.sub.12 (AlO.sub.2).sub.12.(SiO.sub.2).sub.12.27H.sub.2 O.
Claim 5
Dependent Claim
34 words
The non-corrosive toothpaste of claim 1 wherein the zeolite has a particle size distribution wherein at least 97% of the particles are smaller than 15 μm and about 40% are smaller than 5 μm.
References Cited (Backward Citations)
US4132771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |