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US4388069A
Expired / Lapsed
US
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Dental restorative material
Assignee: Blendax GmbH
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Filing: 1982-04-15
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Granted: 1983-06-14
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Expires: 2002-04-15
Abstract
Abstract Dental restorative material containing polymerizable (meth)acrylic compounds in admixture with amorphous and crystalline fillers.
Inventors
- 👤 Jan A. Orlowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
Dental restoring material containing at least one polymerizable (meth)acrylic compound and 60 to 90% by weight of the total composition of filler mixture of inorganic filler compounds, the filler mixture consisting essentially of (a) 50 to 90% by weight, of the filler mixture, of an amorphous filling material, (b) 10 to 50% by weight, of the filler mixture, of crystalline aluminum silicate, crystalline calcium silicate or a mixture thereof with both crystalline compounds having an average particle size from about 0.3 to 20 microns, and (c) up to 10% by weight, of the filler mixture, of a microfiller with an average particle size of not more than 200 millimicrons.
Claim 2
Dependent Claim
109 words
Dental restoring material containing at least one polymerizable (meth)acrylic compound and 60 to 90% by weight of the total composition of filler mixture of inorganic filler compounds, the filler mixture consisting essentially of (a) 50 to 90% by weight, of the filler mixture, of an amorphous filling material, (b) 10 to 50% by weight, of the filler mixture, of crystalline aluminum silicate, crystalline calcium silicate or a mixture thereof with both crystalline compounds having an average particle size from about 0.3 to 20 microns, and (c) up to 10% by weight, of the filler mixture, of a microfiller with an average particle size of not more than 200 millimicrons.
Claim 3
Dependent Claim
18 words
Dental restoring material according to claim 1 wherein at least one of the filler mixture components is silanized.
Claim 4
Dependent Claim
25 words
Dental restoring material according to claim 2 wherein component (b) of the filler mixture is silanized aluminum silicate, silanized calcium silicate or a mixture thereof.
Claim 5
Dependent Claim
46 words
Dental restoring material according to claim 1 wherein the filler mixture is about 50 to about 75% by weight of amorphous lithium aluminum silicate, about 25 to about 50% by weight of crystalline aluminum silicate, both having an average particle size of less than 0.1 microns.
Claim 6
Dependent Claim
18 words
Dental restoring materials according to claim 4 wherein at least one of the filler mixture components is silanized.
Claim 7
Dependent Claim
115 words
A light-curable dental restoring material containing at least one polymerizable (meth)acrylic compound and about 60 to about 90% by weight of the total composition of a filler mixture of inorganic filling materials consisting essentially of (a) 60 to 75% by weight of an amorphous filling material with a particle size from 1 to 20 microns and (b) 25 to 40% by weight of a crystalline filling material selected from the group consisting of aluminum silicate, calcium silicate and mixtures thereof with a particle size from 0.5 to 1 microns, and (c) up to 10% by weight, of the filler mixture, of a finely divided silica having an average particle size of less than 0.2 microns.
Claim 8
Dependent Claim
115 words
A light-curable dental restoring material containing at least one polymerizable (meth)acrylic compound and about 60 to about 90% by weight of the total composition of a filler mixture of inorganic filling materials consisting essentially of (a) 60 to 75% by weight of an amorphous filling material with a particle size from 1 to 20 microns and (b) 25 to 40% by weight of a crystalline filling material selected from the group consisting of aluminum silicate, calcium silicate and mixtures thereof with a particle size from 0.5 to 1 microns, and (c) up to 10% by weight, of the filler mixture, of a finely divided silica having an average particle size of less than 0.2 microns.
Claim 9
Dependent Claim
20 words
A light-curable dental restoring material according to claim 6 wherein at least one of the inorganic filling materials is silanized.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |