US4427799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restoring material and a filler therefor
Assignee: Blendax GmbH
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Filing: 1981-09-23
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Granted: 1984-01-24
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Expires: 2001-09-23
Abstract
Abstract Dental restoring materials on the basis of polymerizable compounds which show good mechanical properties and satisfactory polishability after hardening containing at least one new filler consisting preferably of porous silica with a medium particle size from about 5 to about 300 millimicrons and an organo-silicon content from about 5 to about 25%, preferably from 10-12 to 18-20%.
Inventors
- 👤 Jan A. Orlowski
- 👤 David V. Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:35
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
Dental restoring material comprising about 50 to about 88% by weight, calculated on the total composition, of a filler and at least one polymerizable compound, characterized in that the filler is a mixture of (a) 8 to 60% by weight of at least one silanized filler with a medium particle diameter from about 5 to about 300 millimicrons and an organosilicon content from about 5 to about 25%, calculated on the total filler, and (b) 40 to 92% by weight of at least one filler with a medium particle diameter of at least about 0.5 microns.
Claim 2
Dependent Claim
96 words
Dental restoring material comprising about 50 to about 88% by weight, calculated on the total composition, of a filler and at least one polymerizable compound, characterized in that the filler is a mixture of (a) 8 to 60% by weight of at least one silanized filler with a medium particle diameter from about 5 to about 300 millimicrons and an organosilicon content from about 5 to about 25%, calculated on the total filler, and (b) 40 to 92% by weight of at least one filler with a medium particle diameter of at least about 0.5 microns.
Claim 3
Dependent Claim
29 words
Dental restoring material according to claim 1, characterized by the fact that the filler (b) with a medium particle diameter of at least 0.5 microns is a non-porous filler.
Claim 4
Dependent Claim
20 words
Dental restoring material according to claim 1 or 2, characterized by the fact that the filler (b) has been silanized.
Claim 5
Dependent Claim
25 words
Dental restoring material claim 1 characterized by the fact that the filler (a) has a medium particle diameter from about 10 to about 100 millimicrons.
Claim 6
Dependent Claim
29 words
Dental restoring material claim 1 characterized by the fact that the silanized filler (a) has an organosilicon content from about 10 to about 20% (calculated to the total filler).
Claim 7
Dependent Claim
50 words
In a dental restoring material containing a polymerizable component and a filler component, wherein the improvement comprises as a filler component a silanized material with a medium particle diameter from about 5 to about 300 millimicrons and an organosilicon content from about 5 to 25% based on the silanized material.
Claim 8
Dependent Claim
50 words
In a dental restoring material containing a polymerizable component and a filler component, wherein the improvement comprises as a filler component a silanized material with a medium particle diameter from about 5 to about 300 millimicrons and an organosilicon content from about 5 to 25% based on the silanized material.
Claim 9
Dependent Claim
16 words
The dental restoring material according to claim 6 wherein said silanized material is silanized porous silica.
Claim 10
Dependent Claim
31 words
In the process of restoring damaged teeth by applying a dental restoring material to the damaged teeth, the improvement comprises said dental restoring material containing a material according to claim 6.
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |