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Patent US4159316A successfully refreshed from Google Patents.
US4159316A
Expired / Lapsed
US
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Self-heating dentifrice
Assignee: Colgate Palmolive Co
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Filing: 1978-03-06
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Granted: 1979-06-26
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Expires: 1998-03-06
Abstract
Abstract There is disclosed a stable anhydrous self-heating dentifrice which contains an anhydrous synthetic zeolite as the sole or major abrasive, a hydroxypropyl cellulose gelling agent and a propylene glycol humectant as the essential ingredients.
Inventors
- 👤 Joseph P. Januszewski
- 👤 Lesley J. Altan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:56
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/22; A61K8/26; A61K8/29; A61K8/30; A61K8/33; A61K8/34; A61K8/345; A61K8/72; A61K8/73; A61K8/731; A61Q; A61Q11/00; A61K2800/00; A61K2800/20; A61K2800/24; A61K2800/242; A61K2800/30; A61K2800/31; A61K2800/40; A61K2800/54; A61K2800/542; A61K2800/5422
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A stable anhydrous self-contained heat releasing dentifrice which generates heat in the mouth consisting of a finely divided anhydrous synthetic zeolite having an appreciable heat of hydration and capable of being reversibly dehydrated as the sole or major polishing agent in amounts of about 20 to 50% by weight, about 0.1 to 5% by weight of at least one flavoring agent, and about 20 to 75% of an anhydrous liquid vehicle, consisting essentially of propylene glycol gelled with a finely divided solid hydroxy-propyl cellulose polymer having a molecular weight of 60,000-1,000,000, said dentifrice being prepared in a substantially anhydrous environment.
Claim 2
Dependent Claim
100 words
A stable anhydrous self-contained heat releasing dentifrice which generates heat in the mouth consisting of a finely divided anhydrous synthetic zeolite having an appreciable heat of hydration and capable of being reversibly dehydrated as the sole or major polishing agent in amounts of about 20 to 50% by weight, about 0.1 to 5% by weight of at least one flavoring agent, and about 20 to 75% of an anhydrous liquid vehicle, consisting essentially of propylene glycol gelled with a finely divided solid hydroxy-propyl cellulose polymer having a molecular weight of 60,000-1,000,000, said dentifrice being prepared in a substantially anhydrous environment.
Claim 3
Dependent Claim
36 words
A dentifrice according to claim 1, wherein the synthetic zeolite is a crystalline metal alumino silicate, said metal being selected from the group consisting of an alkali metal, alkaline earth metal, zinc, copper and mixtures thereof.
Claim 4
Dependent Claim
29 words
A dentifrice in accordance with claim 1, wherein the gelling agent constitutes about 1-5% by weight of the total formulation, and the propylene glycol constitutes 35-60% by weight thereof.
Claim 5
Dependent Claim
18 words
A dentifrice in accordance with claim 1, which additionally contains about 0.5 to 5% of a surface-active agent.
Claim 6
Dependent Claim
12 words
A dentifrice according to claim 4, wherein the surface-active agent is anionic.
Claim 7
Dependent Claim
32 words
A dentifrice in accordance with claim 5, which also contains a sweetening agent and wherein the flavoring agent is a flavoring oil in an amount of about 0.5 to 2% by weight.
Claim 8
Dependent Claim
24 words
A dentifrice in accordance with claim 1, which contains up to about 20% of an additional dentally acceptable, water-insoluble, anhydrous finely divided polishing agent.
Claim 9
Dependent Claim
22 words
A dentifrice in accordance with claim 1, wherein the gelling agent is hydroxypropyl cellulose polymer having a molecular weight of about 300,000.
Claim 10
Dependent Claim
39 words
A dentifrice in accordance with claim 7, wherein said additional polishing agent is an amorphous alkali metal or alkaline earth metal alumino-silicate containing at least 70% silica, up to about 10% alumina and up to about 10% sodium oxide.
Claim 11
Dependent Claim
26 words
A dentifrice in accordance with claim 3, wherein the anhydrous environment constitutes a vacuum of at least about 20 inches and up to 30 inches mercury.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-25 | 1982-12-25 | 1983-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-25 | 1986-12-25 | 1987-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-25 | 1990-12-25 | 1991-06-26 | $7700.00 | Window Closed / Lapsed |