US3962267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental cement composition
Assignee: Teikoku Chemical Industry Co Ltd
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Filing: 1974-07-11
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Granted: 1976-06-08
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Expires: 1994-07-11
Abstract
Abstract The dental cement composition comprises an aqueous resin composition prepared by the copolymerization of 3-butene-1,2,3-tricarboxylic acid and an α,β-olefinic unsaturated monocarboxylic acid and, when desired, an additional polymerizable monomer as well as a metal oxide. The dental cement composition possesses compressive strength.
Inventors
- 👤 Narishige Suzuki
- 👤 Yoshihiro Morino
- 👤 Yoshitaka Hashiguchi
- 👤 Tunehiro Segawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:38
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/02; A; A61; A61K; A61K6/00; A61K6/30; A61K6/80; A61K6/802; A61K6/807; A61K6/816; A61K6/884; A61K6/887; A61K6/889; C08F220/00; C08F220/02; C08F220/04; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
A dental cement composition comprising: A. an aqueous solution of a resin prepared by copolymerizing: 1. about 5 to 60 parts by weight of 3-butene-1,2,3-tricarboxylic acid, 2. about 40 to 95 parts by weight of an α,β-olefinically unsaturated monocarboxylic acid, and 3. about 0 to 15 parts by weight of an additional polymerizable monomer, said copolymer having a molecular weight between about 5,000 and 250,000, said aqueous solution containing at least about 40% resin solids; and B. a metal oxide, C. the ratio of the copolymer to the metal oxide being about 1:1 to about 1:4.
Claim 2
Dependent Claim
96 words
A dental cement composition comprising: A. an aqueous solution of a resin prepared by copolymerizing: 1. about 5 to 60 parts by weight of 3-butene-1,2,3-tricarboxylic acid, 2. about 40 to 95 parts by weight of an α,β-olefinically unsaturated monocarboxylic acid, and 3. about 0 to 15 parts by weight of an additional polymerizable monomer, said copolymer having a molecular weight between about 5,000 and 250,000, said aqueous solution containing at least about 40% resin solids; and B. a metal oxide, C. the ratio of the copolymer to the metal oxide being about 1:1 to about 1:4.
Claim 3
Dependent Claim
18 words
A dental cement composition, as in claim 1 wherein the copolymer is formed by copolymerizing (A)(1) and (A)(2).
Claim 4
Dependent Claim
25 words
The dental cement composition of claim 1, wherein the α,β-olefinically unsaturated monocarboxylic acid is selected from the group consisting of acrylic acid and methacrylic acid.
Claim 5
Dependent Claim
41 words
The dental cement composition of claim 1, wherein the additional polymerizable monomer is selected from the group consisting of esters of acrylic acid and methacrylic acid, an unsaturated carboxylic acid and esters thereof 3butene-1,2,3-tricarboxylic acid alkyl ester, vinyl acetate and styrene.
Claim 6
Dependent Claim
30 words
The dental cement composition of claim 1, wherein the aqueous copolymer solution has a solids concentration of about 40 to 60% and a viscosity of about 100 to 8,000 cps.
Claim 7
Dependent Claim
19 words
The dental cement composition of claim 1, wherein a metal oxide calcined at about 800° to 1300°C. is used.
Claim 8
Dependent Claim
32 words
The dental composition of claim 1, wherein the metal oxide is one or more members selected from the group consisting of oxides of zinc, magnesium, silicon, bismuth, barium, calcium, aluminum and titanium.
Claim 9
Dependent Claim
14 words
The dental composition of claim 1, containing metal halides, phosphates, sulfates, borates or silicates.
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |