US4885155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticalculus compositions using pyrophosphate salt
Assignee: Procter and Gamble Co
•
Filing: 1989-02-08
•
Granted: 1989-12-05
•
Expires: 2009-02-08
Abstract
Abstract Disclosed are oral compositions containing particular pyrophosphate salts which provide an anticalculus benefit.
Inventors
- 👤 John J. Parran, Jr.
- 👤 Nabil Y. Sakkab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61Q; A61Q11/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
In an aqueous oral pyrophosphate and fluoride anticalculus dentifrice composition having a pH of from about 6 to about 10 comprising: (a) from about 10% to about 70% of a dental abrasive compatible with fluoride and pyrophosphate ions selected from the group consisting of β-phase calcium pyrophosphate, particulate thermosetting resins, silicas, alumina, insoluble metaphosphates and mixtures thereof; and (b) an amount of a fluoride ion source sufficient to provide from about 50 ppm to about 3500 ppm fluoride ions; wherein the improvement comprises the composition containing a mixture of tetra sodium and tetra potassium pyrophosphate with these salts being present in amounts effective, at least 1.5% of pyrophosphate ions being provided, to inhibit the formation of dental tartar or calculus at the gingival margin and wherein more tetrapotassium pyrophosphate than tetrasodium pyrophosphate is used.
Claim 2
Dependent Claim
134 words
In an aqueous oral pyrophosphate and fluoride anticalculus dentifrice composition having a pH of from about 6 to about 10 comprising: (a) from about 10% to about 70% of a dental abrasive compatible with fluoride and pyrophosphate ions selected from the group consisting of β-phase calcium pyrophosphate, particulate thermosetting resins, silicas, alumina, insoluble metaphosphates and mixtures thereof; and (b) an amount of a fluoride ion source sufficient to provide from about 50 ppm to about 3500 ppm fluoride ions; wherein the improvement comprises the composition containing a mixture of tetra sodium and tetra potassium pyrophosphate with these salts being present in amounts effective, at least 1.5% of pyrophosphate ions being provided, to inhibit the formation of dental tartar or calculus at the gingival margin and wherein more tetrapotassium pyrophosphate than tetrasodium pyrophosphate is used.
Claim 3
Dependent Claim
21 words
An oral composition according to claim 1 which in addition contains from about 0% to about 10% of a sudsing agent.
Claim 4
Dependent Claim
20 words
An oral composition according to claim 2 which in addition contains from about 0.1% to about 10% of a binder.
Claim 5
Dependent Claim
24 words
An oral composition according to claim 3 which is in the form of a toothpaste and in which the abrasive is a silica abrasive.
Claim 6
Dependent Claim
18 words
An oral composition according to claim 4 which in addition contains sodium fluoride as the fluoride ion source.
Claim 7
Dependent Claim
16 words
An oral composition according to claim 1 which is in the form of a liquid dentifrice.
Claim 8
Dependent Claim
16 words
An oral composition according to claim 5 which is in the form of a liquid dentifrice.
Claim 9
Dependent Claim
33 words
A method of inhibiting calculus or tartar by applying to the enamel of a person susceptible to the formation of calculus or tartar an effective amount of a composition according to claim 1.
Claim 10
Dependent Claim
13 words
A method according to claim 8 wherein the composition contains a silica abrasive.
Claim 11
Dependent Claim
17 words
A method according to claim 9 wherein the composition contains sodium fluoride as the fluoride ion source.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
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