US4132773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrices
Assignee: Lever Brothers Co
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Filing: 1977-05-18
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Granted: 1979-01-02
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Expires: 1997-05-18
Abstract
Abstract Dentifrice composition for combatting dental caries containing sodium trimetaphosphate as an anti-caries agent and a compatible abrasive agent comprising a silica xerogel.
Inventors
- 👤 John S. Best
- 👤 Ronald Hoyles
- 👤 Geoffrey S. Ingram
- 👤 Francis B. J. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:51
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61K8/25
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
An improved dentifrice composition effective against dental caries comprising (a) from about 0.5 to about 6% by weight of sodium trimetaphosphate as an anti-caries agent; and (b) from about 0.5 to about 95% by weight of a silica xerogel as an abrasive cleaning agent having an average particle size of about 2 to about 30 microns; the percentages being based on the total weight of the composition.
Claim 2
Dependent Claim
67 words
An improved dentifrice composition effective against dental caries comprising (a) from about 0.5 to about 6% by weight of sodium trimetaphosphate as an anti-caries agent; and (b) from about 0.5 to about 95% by weight of a silica xerogel as an abrasive cleaning agent having an average particle size of about 2 to about 30 microns; the percentages being based on the total weight of the composition.
Claim 3
Dependent Claim
33 words
The dentifrice composition of claim 1 which is in the form of a toothpaste and wherein the silica xerogel is present in an amount of from about 5% to about 50% by weight.
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) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |