US4634589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrice for hypersensitive teeth
Assignee: Wurttembergische Parfumerie Fabrik GmbH
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Filing: 1985-05-07
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Granted: 1987-01-06
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Expires: 2005-05-07
Abstract
Abstract A dentifrice for hypersensitive teeth containing at least 15% by weight of an apatite having an average particle size of less than 8 μm and an abrasion value (RDA) of less than 30 as the sole crystalline and polishing substance. No further soluble mineral salts are present in the dentifrice. The dentifrice may also contain a local anesthetic.
Inventors
- 👤 Hans-Ulrich Scheller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:34
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61Q; A61Q11/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
In a method of polishing hypersensitive teeth the improvement, showing a significant amelioration after 3 to 8 days, and in which users are found to be pain-free after 15 days wherein there is rubbed or mechanically pressed into the exposed small dentine channels for 3 to 15 days finely divided apatite by application of a dentifrice containing at least 15% by weight of an apatite selected from the group consisting of amorphous hydroxyl apatite, fluoro apatite, and mixtures thereof, having a bulk density of less than 180 g/l having an average particle size of 8 millimicrons and an abrasion value (RDA) of less than 30 as the sole crystalline and polishing substance, said dentifrice containing no further soluble mineral salts.
Claim 2
Dependent Claim
120 words
In a method of polishing hypersensitive teeth the improvement, showing a significant amelioration after 3 to 8 days, and in which users are found to be pain-free after 15 days wherein there is rubbed or mechanically pressed into the exposed small dentine channels for 3 to 15 days finely divided apatite by application of a dentifrice containing at least 15% by weight of an apatite selected from the group consisting of amorphous hydroxyl apatite, fluoro apatite, and mixtures thereof, having a bulk density of less than 180 g/l having an average particle size of 8 millimicrons and an abrasion value (RDA) of less than 30 as the sole crystalline and polishing substance, said dentifrice containing no further soluble mineral salts.
Claim 3
Dependent Claim
16 words
Method of claim 1, wherein the dentifrice has average particle size of less than 4 μm.
References Cited (Backward Citations)
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Cited
US4048300A
Cited
US4177258A
Cited
US4183915A
Cited
US4327079A
Cited
US4342741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |