US2876166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrice preparations
Assignee: Indiana University Foundation Inc
•
Filing: 1953-07-08
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Granted: 1959-03-03
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Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 William H Nebergall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:22
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/20; A61K8/21; A61K8/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A DENTIFRICE COMBINING A FLUORINE-CONTAINING COMPOUND AND AN ABRASIVE, IN WHICH SAID FLUORINE-CONTAINING COMPOUND IS ONE WHICH NORMALLY DISSOCIATES TO YIELD FLUORIDE IONS IN AQUEOUS SOLUTION, AND WHICH IS PRESENT IN SAID DENTIFRICE IN AN AMOUNT WHICH CONTAINS AT LEAST 0.01%, BY WEIGHT, OF IONIZABLE FLUORIDE BUT NOT MORE THAN 0.4%, BY WEIGHT, TOTAL FLUORINE, AND IN WHICH SAID ABRASIVE IS PRESENT AS AT LEAST 20%, BY WEIGHT, OF SAID DENTIFRICE AND COMPRISES ESSENTIALLY AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM POLYPHOSPHATES, CALCIUM METAPHOSPHATE, CALCIUM OXYAPATITE, AND B- AND A-TRICALCIUM ORTHOPHOSPHATES.
Claim 2
Dependent Claim
95 words
A DENTIFRICE COMBINING A FLUORINE-CONTAINING COMPOUND AND AN ABRASIVE, IN WHICH SAID FLUORINE-CONTAINING COMPOUND IS ONE WHICH NORMALLY DISSOCIATES TO YIELD FLUORIDE IONS IN AQUEOUS SOLUTION, AND WHICH IS PRESENT IN SAID DENTIFRICE IN AN AMOUNT WHICH CONTAINS AT LEAST 0.01%, BY WEIGHT, OF IONIZABLE FLUORIDE BUT NOT MORE THAN 0.4%, BY WEIGHT, TOTAL FLUORINE, AND IN WHICH SAID ABRASIVE IS PRESENT AS AT LEAST 20%, BY WEIGHT, OF SAID DENTIFRICE AND COMPRISES ESSENTIALLY AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM POLYPHOSPHATES, CALCIUM METAPHOSPHATE, CALCIUM OXYAPATITE, AND B- AND A-TRICALCIUM ORTHOPHOSPHATES.
References Cited (Backward Citations)
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Cited
US2636806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |