Patent US4144322A successfully refreshed from Google Patents.
US4144322A
Expired / Lapsed
US
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Reduction of abrasiveness in dentrifices
Assignee: Colgate Palmolive Co
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Filing: 1976-12-27
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Granted: 1979-03-13
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Expires: 1996-12-27
Abstract
Abstract Dentrifice possessing superior cleaning and polishing characteristics comprising a silicious and calcined alumina abrasive system in an amount to provide an enamel abrasion to the dentrifice of above about 450, (as measured by radioactive method) about 0.1-5% by weight and preferably 1-5% of a calcium, magnesium or sodium salt selected from the group consisting of the carbonates, bicarbonates, chlorides, phosphates, silicates and nitrates, with or without raising the pH of said composition to preferably above about 7, so as to reduce said enamel abrasion thereof.
Inventors
- 👤 Martin Cordon
- 👤 Robert E. Dickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/25; A61K8/26; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A dentifrice toothpaste of superior cleaning and polishing characteristics having a pH maintained above about 7, comprising an alkali metal or alkaline earth metal aluminosilicate as a siliceous abrasive and flat flakes or crystals of alpha alumina as a calcined alumina abrasive having a particle size of about 1 to 15 microns in diameter and in an amount to provide a radioactive enamel abrasion to the dentifrice of above about 450, said calcined alumina being present in an amount of at least 7.5% and up to 20% by weight, and said siliceous abrasive being present in an amount of at least 10% and up to 70% by weight of said dentifrice, and about 0.1 to 5% by weight of a calcium, magnesium or sodium salt, selected from the group consisting of the carbonates, bicarbonates, chlorides, phosphates, silicates and nitrates, so as to reduce said enamel abrasion of the dentifrice.
Claim 2
Dependent Claim
149 words
A dentifrice toothpaste of superior cleaning and polishing characteristics having a pH maintained above about 7, comprising an alkali metal or alkaline earth metal aluminosilicate as a siliceous abrasive and flat flakes or crystals of alpha alumina as a calcined alumina abrasive having a particle size of about 1 to 15 microns in diameter and in an amount to provide a radioactive enamel abrasion to the dentifrice of above about 450, said calcined alumina being present in an amount of at least 7.5% and up to 20% by weight, and said siliceous abrasive being present in an amount of at least 10% and up to 70% by weight of said dentifrice, and about 0.1 to 5% by weight of a calcium, magnesium or sodium salt, selected from the group consisting of the carbonates, bicarbonates, chlorides, phosphates, silicates and nitrates, so as to reduce said enamel abrasion of the dentifrice.
Claim 3
Dependent Claim
30 words
A dentifrice in accordance with claim 1, wherein the pH of the dentifrice is increased by the addition of an alkaline agent to effect an additional reduction in enamel abrasivity.
Claim 4
Dependent Claim
18 words
A dentifrice as in claim 2, containing an alkaline buffering agent to maintain a pH above about 7.
Claim 5
Dependent Claim
32 words
A dentifrice as in claim 1 in which said calcined alumina is in the form of alpha alumina flakes having a mean particle diameter in the range of 1 to 15 microns.
Claim 6
Dependent Claim
25 words
A dentifrice as in claim 1 in which said silicious abrasive is an amorphous alumino-silicate having a particle size of about 2 to 40 microns.
Claim 7
Dependent Claim
29 words
A dentifrice as in claim 1, wherein the salt is calcium carbonate and is present in amount of 1-5% by weight and the pH is about 7.8 to 8.0.
Claim 8
Dependent Claim
29 words
A dentifrice as in claim 1, wherein the salt is sodium bicarbonate and is present in amount of 1-5% by weight and the pH is about 8.3 to 8.9.
Claim 9
Dependent Claim
29 words
A dentifrice as in claim 1, wherein the salt is magnesium silicate and is present in amount of 1-5% by weight and the pH is about 8.1 to 8.5.
Claim 10
Dependent Claim
27 words
A dentifrice as in claim 1, wherein the salt is calcium chloride and is present in amount of 1-5% by weight and the pH is about 8.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |