US3862307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrices containing a cationic therapeutic agent and improved silica abrasive
Assignee: Procter and Gamble Co
•
Filing: 1973-04-09
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Granted: 1975-01-21
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Expires: 1993-04-09
Abstract
Abstract Dentifrices contain water, a cationic therapeutic agent, and an amorphous silica abrasive which has been pretreated with hydrofluoric acid. Preferably, the cationic therapeutic agent is a metal cation such as indium ion. The pretreated abrasive has improved compatability with cationic agents so that less cationic therapeutic agent is adsorbed by the abrasive and more is available for treatment of the teeth.
Inventors
- 👤 Giulio David Neil Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/25; A61K8/20; A61K8/21; A61Q; A61Q11/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
A dentifrice of claim 1 wherein the cationic therapeutic agent is a therapeutic metallic cation.
Claim 2
Dependent Claim
16 words
A dentifrice of claim 2 wherein the amorphous silica is a synthetic, amorphous, porous silica xerogel.
Claim 3
Dependent Claim
27 words
A dentifrice of claim 3 wherein the cationic therapeutic agent comprises a metal ion selected from the group consisting of stannous ion, indium ion, and calcium ion.
Claim 4
Dependent Claim
17 words
A dentifrice of claim 4 having a pH of from about pH 3 to about pH 5.
Claim 5
Dependent Claim
28 words
A dentifrice of claim 2 containing, in addition, a physiologically safe amount of a soluble fluoride salt selected from the group consisting of sodium fluoride and stannous fluoride.
Claim 6
Dependent Claim
37 words
A dentifrice of claim 6 wherein the abrasive has been treated with about 0.07 percent by weight of said composition of hydrofluoric acid and the soluble fluoride salt is present at a level of about 0.18 percent.
References Cited (Backward Citations)
US3538230A
Cited
US3669624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |