Patent US3935304A successfully refreshed from Google Patents.
US3935304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental creams
Assignee: Colgate Palmolive Co
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Filing: 1974-04-30
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Granted: 1976-01-27
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Expires: 1994-04-30
Abstract
Abstract There is disclosed a toothpaste containing dispersed particles of sodium bicarbonate and a polishing agent composition comprising titanium dioxide powder having a particle size less than about 2 microns, the amount of titanium dioxide powder being about 0.1 by weight on the weight of the toothpaste and a method of making same.
Inventors
- 👤 Joseph P. Januszewski
- 👤 Martin Cordon
- 👤 William Grant Pierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/29; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
145 words
A toothpaste containing at least about 25% by weight dispersed particles of sodium bicarbonate and a polishing agent system comprising titanium dioxide powder having a particle size less than about two microns, the amount of titanium dioxide particles being more than about 0.1% of the weight of the toothpaste, said particles dispersed in a vehicle containing sufficient liquids, said vehicle consisting essentially of about 5 to 35% water and sufficient viscous water miscible polyol humectant or mixtures thereof, and a sufficient amount of gelling or thickening agent to impart to the toothpaste the pasty consistency, body and the non-tacky nature which is characteristic of conventional dental creams or toothpastes, said sodium bicarbonate being primarily in an undissolved solid state, said dental cream having a granular textured appearance comprising a substantially dispersed non-crystalline appearing granulate of macroscopic crystalline bicarbonate granules in an otherwise smooth continuous matrix.
Claim 2
Dependent Claim
145 words
A toothpaste containing at least about 25% by weight dispersed particles of sodium bicarbonate and a polishing agent system comprising titanium dioxide powder having a particle size less than about two microns, the amount of titanium dioxide particles being more than about 0.1% of the weight of the toothpaste, said particles dispersed in a vehicle containing sufficient liquids, said vehicle consisting essentially of about 5 to 35% water and sufficient viscous water miscible polyol humectant or mixtures thereof, and a sufficient amount of gelling or thickening agent to impart to the toothpaste the pasty consistency, body and the non-tacky nature which is characteristic of conventional dental creams or toothpastes, said sodium bicarbonate being primarily in an undissolved solid state, said dental cream having a granular textured appearance comprising a substantially dispersed non-crystalline appearing granulate of macroscopic crystalline bicarbonate granules in an otherwise smooth continuous matrix.
Claim 3
Dependent Claim
14 words
A toothpaste as in claim 1 containing about 25 to about 57% sodium bicarbonate.
Claim 4
Dependent Claim
19 words
A toothpaste as in claim 1 in which the sodium bicarbonate particles are principally about 150 microns in diameter.
Claim 5
Dependent Claim
17 words
A toothpaste as in claim 1 in which said particles are dispersed in a thickened water-glycerol vehicle.
Claim 6
Dependent Claim
21 words
A toothpaste as defined in claim 1 wherein said bicarbonate has a particle size largely below about 0.4 mm in diameter.
Claim 7
Dependent Claim
26 words
A toothpaste as defined in claim 1 wherein a major proportion by weight of said bicarbonate has a particle size above about 0.01 mm in diameter.
Claim 8
Dependent Claim
27 words
A toothpaste as defined in claim 1 wherein said titanium dioxide is included in amounts of about 0.2 to about 0.6 percent by weight of the toothpaste.
Claim 9
Dependent Claim
21 words
A toothpaste as defined in claim 1 wherein the particle size of said titanium dioxide is less than about 1 micron.
Claim 10
Dependent Claim
18 words
A toothpaste as defined in claim 1 additionally containing less than about 25% of a further abrasive ingredient.
Claim 11
Dependent Claim
15 words
A toothpaste as defined in claim 1 additionally containing less than about 25% calcium carbonate.
Claim 12
Dependent Claim
29 words
A toothpaste as defined in claim 1 wherein said titanium dioxide is a grit-free anatese powder at least 99.0% of which passes through a No. 325 U.S. standard sieve.
Claim 13
Dependent Claim
32 words
A toothpaste as defined in claim 1 wherein said particles of sodium bicarbonate are generally monoclinic crystals some of which have projecting spike-like portions of generally rhombohedral shape with may reentraut angles.
Claim 14
Dependent Claim
25 words
A toothpaste as in claim 10 wherein said abrasive is selected from the group consisting of silica, alumina, silicates and carbonates non-reactive with the bicarbonate.
Claim 15
Dependent Claim
18 words
A toothpaste as in claim 1 wherein the sodium bicarbonate - water ratio is about 3:1 to 6:1.
Claim 16
Dependent Claim
18 words
A toothpaste as defined in claim 1 further including at least about 0-5% of a suitable flavoring oil.
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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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |