US4170634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified abrasive system for dentifrices
Assignee: Colgate Palmolive Co
•
Filing: 1977-01-17
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Granted: 1979-10-09
•
Expires: 1997-01-17
Abstract
Abstract Dentifrice possessing superior cleaning and polishing characteristics containing as the essential ingredients at least one hard abrasive in an amount to provide a radioactive enamel abrasion to the dentifrice of above about 400, such as calcined alumina, zirconium silicate, and the like, and a non-toxic zinc compound in an amount to provide at least about 0.0065% by weight of zinc to the dentifrice.
Inventors
- 👤 Martin Cordon
- 👤 James Norfleet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:31
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61K8/27; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A dentifrice of superior cleaning and polishing characteristics containing as the essential ingredients, an abrasive system having at least one soft abrasive and including a hard abrasive having a particle size of about 1 to 15 microns in diameter selected from the group consisting of calcined alumina, zirconium silicate, feldspar, pumice, and ZrO 2 , and in an amount to provide a radioactive enamel abrasion value to the dentifrice of above about 400 and present in an amount of at least 7.5% and up to 20% by weight of the dentifrice, and a non-toxic zinc compound in an amount to provide at least about 0.0065% zinc to the dentifrice, said abrasive system being pretreated with a water-soluble zinc compound selected from the group consisting of zinc chloride, zinc sulfate, zinc acetate, zinc nitrate in an amount of about 0.01-2.0% by weight of the dentifrice, so as to reduce the enamel abrasion of the dentifrice.
Claim 2
Dependent Claim
154 words
A dentifrice of superior cleaning and polishing characteristics containing as the essential ingredients, an abrasive system having at least one soft abrasive and including a hard abrasive having a particle size of about 1 to 15 microns in diameter selected from the group consisting of calcined alumina, zirconium silicate, feldspar, pumice, and ZrO 2 , and in an amount to provide a radioactive enamel abrasion value to the dentifrice of above about 400 and present in an amount of at least 7.5% and up to 20% by weight of the dentifrice, and a non-toxic zinc compound in an amount to provide at least about 0.0065% zinc to the dentifrice, said abrasive system being pretreated with a water-soluble zinc compound selected from the group consisting of zinc chloride, zinc sulfate, zinc acetate, zinc nitrate in an amount of about 0.01-2.0% by weight of the dentifrice, so as to reduce the enamel abrasion of the dentifrice.
Claim 3
Dependent Claim
33 words
A dentifrice as in claim 1 in which said hard abrasive is calcined alumina in the form of alpha alumina flakes having an average diameter in the range of 2 to 7 microns.
Claim 4
Dependent Claim
14 words
A dentifrice as in claim 1 in which said hard abrasive is zirconium silicate.
Claim 5
Dependent Claim
36 words
A dentifrice as in claim 1 in which the amount of said soft dental abrasive is in the range of about 10 to 50% and the amount of said hard abrasive is about 7.5 to 20%.
Claim 6
Dependent Claim
14 words
A dentifrice as in claim 4, in which the soft abrasive is sodium alumino-silicate.
Claim 7
Dependent Claim
13 words
A dentifrice as in claim 1, wherein the hard abrasive is calcined alumina.
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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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |