US4710372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dentifrice for hypersensitive teeth
Assignee: Wurttembergische Parfumerie Fabrik GmbH
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Filing: 1986-09-25
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Granted: 1987-12-01
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Expires: 2006-09-25
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
2026-11-05 03:41
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61Q; A61Q11/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A dentifrice for hypersensitive teeth containing essentially at least 15% by weight of hydroxylapatite or fluoroapatite of an average of particle size of less than 8 microns and an abrasion value (RDA) of less than 30 as the sole crystalline and polishing substance, the dentifrice containing no further soluble mineral salts.
Claim 2
Dependent Claim
51 words
A dentifrice for hypersensitive teeth containing essentially at least 15% by weight of hydroxylapatite or fluoroapatite of an average of particle size of less than 8 microns and an abrasion value (RDA) of less than 30 as the sole crystalline and polishing substance, the dentifrice containing no further soluble mineral salts.
Claim 3
Dependent Claim
10 words
The dentifrice of claim 1 further comprising a local anesthetic.
Claim 4
Dependent Claim
15 words
The dentifrice of claim 1, wherein said average particle size is less than 4 μm.
Claim 5
Dependent Claim
10 words
The dentifrice of claim 3, further comprising a local anesthetic.
References Cited (Backward Citations)
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Cited
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Cited
US4177258A
Cited
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Cited
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Cited
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Cited
US4634589A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |