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Patent US3939262A successfully refreshed from Google Patents.
US3939262A
Expired / Lapsed
US
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Dentifrices
Assignee: Monsanto Co
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Filing: 1974-01-21
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Granted: 1976-02-17
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Expires: 1994-01-21
Abstract
Abstract Dental creams, particularly translucent dental creams, containing finely divided synthetic amorphous silica polishing agents, such polishing agents have an average refractive index of from about 1.410 to 1.440.
Inventors
- 👤 Keun Y. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:33
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/25; A61K2800/00; A61K2800/20; A61K2800/26; A61K2800/262
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
A translucent dental cream comprising 1. a solid phase comprising about 95 to 100% by weight, based on the total weight of the solid phase, as a polishing agent a synthetic amorphous silica prepared by exchanging hydrogen for the alkali metal ion of a particulate alkali metal silicate having an SiO 2 /M 2 O ratio of from about 1.6 to about 3.75 and containing 10 to 25% by weight of water, said polishing agent having an average refractive index of from about 1.410 to 1.440 and an average particle diameter of from about 1 to about 30 microns, and 2. a liquid phase comprising water and a polyhydric alcohol humectant, the refractive index of said liquid phase being essentially the same as the refractive index of said solid phase.
Claim 2
Dependent Claim
130 words
A translucent dental cream comprising 1. a solid phase comprising about 95 to 100% by weight, based on the total weight of the solid phase, as a polishing agent a synthetic amorphous silica prepared by exchanging hydrogen for the alkali metal ion of a particulate alkali metal silicate having an SiO 2 /M 2 O ratio of from about 1.6 to about 3.75 and containing 10 to 25% by weight of water, said polishing agent having an average refractive index of from about 1.410 to 1.440 and an average particle diameter of from about 1 to about 30 microns, and 2. a liquid phase comprising water and a polyhydric alcohol humectant, the refractive index of said liquid phase being essentially the same as the refractive index of said solid phase.
Claim 3
Dependent Claim
22 words
A dental cream according to claim 1 wherein said humectant is selected from the group consisting of sorbitol, glycerin and mixtures thereof.
Claim 4
Dependent Claim
143 words
A translucent dental cream comprising 1. a solid phase consisting essentially of from about 95 to about 100% by weight, based on the total weight of the solid phase of a finely divided synthetic amorphous silica polishing agent prepared by exchanging hydrogen for the alkali metal ion of a particulate alkali metal silicate having an SiO 2 /M 2 O ratio of from about 1.6 to about 3.75 and containing 10 to 25% by weight of water, said polishing agent having an average refractive index from about 1.420 to 1.435 and an average particle diameter from about 3 to about 20 microns, and 2. a liquid phase consisting essentially of water and a polyhydric alcohol humectant, the ratio of said humectant in said water being such that the refractive index of said liquid phase essentially matches the refractive index of said solid phase.
Claim 5
Dependent Claim
143 words
A translucent dental cream comprising 1. a solid phase consisting essentially of from about 95 to about 100% by weight, based on the total weight of the solid phase of a finely divided synthetic amorphous silica polishing agent prepared by exchanging hydrogen for the alkali metal ion of a particulate alkali metal silicate having an SiO 2 /M 2 O ratio of from about 1.6 to about 3.75 and containing 10 to 25% by weight of water, said polishing agent having an average refractive index from about 1.420 to 1.435 and an average particle diameter from about 3 to about 20 microns, and 2. a liquid phase consisting essentially of water and a polyhydric alcohol humectant, the ratio of said humectant in said water being such that the refractive index of said liquid phase essentially matches the refractive index of said solid phase.
Claim 6
Dependent Claim
22 words
A dental cream according to claim 3 wherein said humectant is selected from the group consisting of sorbitol, glycerin, and mixtures thereof.
Claim 7
Dependent Claim
13 words
A composition according to claim 1 wherein visible nontranslucent solid particles are present.
Claim 8
Dependent Claim
10 words
A composition according to claim 1 wherein fluoride is present.
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |