Patent US4400589A successfully refreshed from Google Patents.
Patent US2617732A successfully refreshed from Google Patents.
US4459283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable dentifrice
Assignee: Colgate Palmolive Co
•
Filing: 1981-08-17
•
Granted: 1984-07-10
•
Expires: 2001-08-17
Abstract
Abstract Dentifrices containing chloroform and a siliceous agent have been found to cause instability and corrosion in unlined aluminium tubes. A chloroform/siliceous agent dentifrice formulation is disclosed wherein an additive comprising a mixture of phosphate esters is used to reduce or prevent corrosion and thus provide stability.
Inventors
- 👤 Kenneth Harvey
- 👤 Stephen T. Connors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:26
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/55; A61K8/556; A61Q; A61Q11/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
A stable opaque dentifrice comprising a dentally acceptable oral vehicle and dispersed therein from 10 to 40% by weight of a sodium aluminosilicate polishing agent characterised as having a pH in the range form 9 to 12 in a 20% aqueous slurry, calcined alumina polishing agent in amount from at least about 10% by weight up to an amount such that the total polishing agent is present in amount of up to 75% by weight, a non-toxic amount of at least 0.2% by weight of chloroform, and from 0.05 to 5% by weight of an anionic phosphate ester mixture of monoester of the formula: ##STR4## and diester of the formula: ##STR5## wherein R is an alkyl group of 10 to 20 carbon atoms; n is a number from 1 to 6; and M is hydrogen, alkali metal or ammonium.
Claim 2
Dependent Claim
139 words
A stable opaque dentifrice comprising a dentally acceptable oral vehicle and dispersed therein from 10 to 40% by weight of a sodium aluminosilicate polishing agent characterised as having a pH in the range form 9 to 12 in a 20% aqueous slurry, calcined alumina polishing agent in amount from at least about 10% by weight up to an amount such that the total polishing agent is present in amount of up to 75% by weight, a non-toxic amount of at least 0.2% by weight of chloroform, and from 0.05 to 5% by weight of an anionic phosphate ester mixture of monoester of the formula: ##STR4## and diester of the formula: ##STR5## wherein R is an alkyl group of 10 to 20 carbon atoms; n is a number from 1 to 6; and M is hydrogen, alkali metal or ammonium.
Claim 3
Dependent Claim
23 words
A dentifrice as claimed in claim 1, wherein chloroform is present in an amount in the range from 0.5 to 3.5% by weight.
Claim 4
Dependent Claim
16 words
A dentifrice as claimed in claim 2, wherein about 0.5% by weight of chloroform is present.
Claim 5
Dependent Claim
37 words
A dentifrice as claimed in claim 1, wherein the R group in the anionic phosphate ester mixture contains 16 to 18 carbon atoms and the weight ratio of monoester to diester is from about 1:10 to 10:1.
Claim 6
Dependent Claim
18 words
A dentifrice as claimed in claim 1, wherein the pH of the dentifrice is adjusted with phosphoric acid.
Claim 7
Dependent Claim
17 words
A dentifrice as claimed in claim 1, wherein the dentifrice is packed in an unlined aluminium tube.
Claim 8
Dependent Claim
19 words
The dentifrice claimed in claim 1 wherein the total polishing agent is present in amount of 30-55% by weight.
Claim 9
Dependent Claim
25 words
The dentifrice claimed in claim 1 wherein 20% by weight of said siliceous polishing agent and 10% by weight of said calcined alumina are present.
Claim 10
Dependent Claim
25 words
The dentifrice claimed in claim 1 wherein said siliceous polishing agent contains up to about 10% by weight of alumina interbonded in the silica latice.
Claim 11
Dependent Claim
25 words
The dentifrice claimed in claim 8 wherein said siliceous polishing agent contains up to about 10% by weight of alumina interbonded in the silica lattice.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |