US4154815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc and enzyme toothpowder dentifrice
Assignee: Lever Brothers Co
•
Filing: 1977-12-01
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Granted: 1979-05-15
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Expires: 1997-12-01
Abstract
Abstract There is disclosed in this specification an improved composition for reducing dental plaque and calculus formation, comprising zinc ions and an organoleptically acceptable enzyme, which may be a protease, carbohydrase, or lipase, or mixtures of these enzymes.
Inventors
- 👤 Morton Pader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:32
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/66; A61K8/19; A61K8/27; A61Q; A61Q11/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A fluoride-free tooth powder capable of reducing dental plaque and calculus consisting essentially of: (a) about 0.1% to about 30% of a non-enzyme bound, pharmaceutically acceptable zinc acetate, benzoate, borate, carbonate, citrate, dl-lactate trihydrate, phenolsulfonate, silicate, an alkanoate having 8 to 18 carbon atoms, salicylate, stannate, sulfate, tannate or titanate; (b) from about 0.1% to about 30% of an enzyme preparation selected from the group consisting of a protease, a carbohydrase, a lipase and mixtures thereof; and (c) about 50% to about 99% dental polishing agent.
Claim 2
Dependent Claim
86 words
A fluoride-free tooth powder capable of reducing dental plaque and calculus consisting essentially of: (a) about 0.1% to about 30% of a non-enzyme bound, pharmaceutically acceptable zinc acetate, benzoate, borate, carbonate, citrate, dl-lactate trihydrate, phenolsulfonate, silicate, an alkanoate having 8 to 18 carbon atoms, salicylate, stannate, sulfate, tannate or titanate; (b) from about 0.1% to about 30% of an enzyme preparation selected from the group consisting of a protease, a carbohydrase, a lipase and mixtures thereof; and (c) about 50% to about 99% dental polishing agent.
Claim 3
Dependent Claim
13 words
The tooth powder of claim 1 wherein said zinc compound is zinc phenolsulfonate.
Claim 4
Dependent Claim
17 words
The tooth powder of claim 1 wherein said enzyme preparation is a protease derived from Bacillus subtilis.
Claim 5
Dependent Claim
25 words
The tooth powder of claim 1 wherein the dental polishing agent is present in an amount of from about 70 to about 95% by weight.
Claim 6
Dependent Claim
25 words
The tooth powder of claim 1 wherein the dental polishing agent is present in an amount of from about 90 to about 95% by weight.
Claim 7
Dependent Claim
15 words
The tooth powder of claim 1 wherein the dental polishing agent is a silica xerogel.
Claim 8
Dependent Claim
20 words
The tooth powder of claim 1 wherein the dental polishing agent is a mixture of silica xerogel and silica aerogel.
References Cited (Backward Citations)
AT87896B
Cited
US1435498A
Cited
US1861189A
Cited
US1943467A
Cited
US2035267A
Cited
GB1033229A
Cited
FR4675M
Cited
DE1467790A1
Cited
GB1270200A
Cited
CA961412A
Cited
US3686393A
Cited
GB1296952A
Cited
GB1373001A
Cited
GB1373003A
Cited
DE2203379A1
Cited
ZA71701B
Cited
CA959764A
Cited
NL7102423A
Cited
US4022880A
Cited
US4082841A
Cited
ATA87896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |