US3864470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visually clear toothpaste containing a synthetic precipitated hydrated silica
Assignee: CPPD Inc A CORP OF
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Filing: 1973-07-16
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Granted: 1975-02-04
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Expires: 1993-07-16
Abstract
Abstract A visually clear toothpaste containing a particulate polishing agent, characterised in that the polishing agent is synthetic hydrated precipitated silica.
Inventors
- 👤 Charles Andrew Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:55
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/25; A61P; A61P1/00; A61P1/02; A61K2800/00; A61K2800/20; A61K2800/26; A61K2800/262
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A VISUALLY CLEAR TOOTHPASTE COMPRISING A PARTICULATE SOLID POLISHING AGENT AND A LIQUID PHASE OF SUUBSTANTIALLY THE SAME REFRACTIVE INDEX AS THE POLISHING AGENT, CHARACTERISED IN THAT THE POLISHING AGENT COMPRISES A SYNTHETIC PRECIPITATED HYDRATED SILICA OF AVERAGE AGGREGATE PARTICLE SIZE OF FROM ABOUT 2 TO ABOUT 30 MICRONS, SAID SYNTHETIC PRECIPITATED HYDRATED SILICA BEING PRESENT IN AN AMOUNT OF FROM ABOUT 5 TO ABOUT 50 PERCENT BY WEIGHT OF THE TOOTHPASTE.
Claim 2
Dependent Claim
72 words
A VISUALLY CLEAR TOOTHPASTE COMPRISING A PARTICULATE SOLID POLISHING AGENT AND A LIQUID PHASE OF SUUBSTANTIALLY THE SAME REFRACTIVE INDEX AS THE POLISHING AGENT, CHARACTERISED IN THAT THE POLISHING AGENT COMPRISES A SYNTHETIC PRECIPITATED HYDRATED SILICA OF AVERAGE AGGREGATE PARTICLE SIZE OF FROM ABOUT 2 TO ABOUT 30 MICRONS, SAID SYNTHETIC PRECIPITATED HYDRATED SILICA BEING PRESENT IN AN AMOUNT OF FROM ABOUT 5 TO ABOUT 50 PERCENT BY WEIGHT OF THE TOOTHPASTE.
Claim 3
Dependent Claim
28 words
A toothpaste according to claim 1, wherein the synthetic precipitated hydrated silica has an average aggregate particle size of about 10 microns and a refractive index of 1.45.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |