Patent US3957968A successfully refreshed from Google Patents.
US3957968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrices containing flat flakes of alpha-alumina
Assignee: Colgate Palmolive Co
•
Filing: 1975-03-25
•
Granted: 1976-05-18
•
Expires: 1995-03-25
Abstract
Abstract Dentifrices containing flat flakes of alpha-alumina.
Inventors
- 👤 Martin Cordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61K8/02; A61K8/0241; A61K8/0254; A61Q; A61Q11/00; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A dentifrice comprising, as an abrasive, alpha-alumina which is in the form of flakes having an average diameter of less than 20 microns and thicknesses of less than about 3 microns, the proportion of said alpha-alumina being above 0.1% and less than 60%.
Claim 2
Dependent Claim
43 words
A dentifrice comprising, as an abrasive, alpha-alumina which is in the form of flakes having an average diameter of less than 20 microns and thicknesses of less than about 3 microns, the proportion of said alpha-alumina being above 0.1% and less than 60%.
Claim 3
Dependent Claim
17 words
A dentifrice as in claim 1 containing about 1.2 to 1.5% of water-insoluble essential oil flavoring oil.
Claim 4
Dependent Claim
20 words
A dentifrice as in claim 1 in which said flakes have an average diameter of less than about 7 microns.
Claim 5
Dependent Claim
21 words
A dentifrice as in claim 3 in which said average diameter is in the range of about 2 to 7 microns.
Claim 6
Dependent Claim
30 words
A dentifrice as in claim 4 also containing a dental abrasive having a particle size of about 2 to 40 microns and a Mohs hardness of less than about 6.
Claim 7
Dependent Claim
47 words
A dentifrice as in claim 5 in which said Mohs hardness is about 2 to 5 and the proportion of said dental abrasive of said Mohs hardness is in the range of about 10 to 60%, the proportion of said alpha-alumina flakes being about 1 to 5%.
Claim 8
Dependent Claim
34 words
A dentifrice as in claim 5 containing a calcium phosphate as dental abrasive in amount in the range of about 10 to 60%, the proportion of said alpha-alumina flakes being about 1 to 5%.
Claim 9
Dependent Claim
34 words
A dentifrice as in claim 5 containing a sodium aluminosilicate as dental abrasive in amount in the range of about 10 to 60%, the proportion of said alpha-alumina flakes being about 1 to 5%.
Claim 10
Dependent Claim
33 words
A dentifrice as in claim 5 containing hydrated alumina as dental abrasive in amount in the range of about 10 to 60%, the proportion of said alpha-alumina flakes being about 1 to 5%.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |