Patent US4676239A successfully refreshed from Google Patents.
US4670480A
Expired / Lapsed
US
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Dental prosthesis composition
Assignee: Individual
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Filing: 1985-08-16
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Granted: 1987-06-02
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Expires: 2005-08-16
Abstract
Abstract A dental prosthesis composition which may be used for crowns and the preparation of dentures offering improved physical properties together with heat formability at temperatures that can be withstood in the mouth. The composition includes an acrylic polymer, an alkyl methacrylate monomer and a catalysis to cure the composition at room temperature with the addition of one to thirty parts per 100 parts of the liquid by weight of a dialkyl ketone, such as a dimethyl ketone.
Inventors
- 👤 Rudolph D. Morrone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:38
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
A dental prosthesis composition comprising: (a) polymerizable composition comprising an acrylic polymer, an alkyl methacrylate monomer mix and a catalysis means to induce polymerization of the monomer, and (b) one to twenty-eight parts dialkyl ketone per parts by weight of the monomer and dialkyl ketone mixture.
Claim 2
Dependent Claim
46 words
A dental prosthesis composition comprising: (a) polymerizable composition comprising an acrylic polymer, an alkyl methacrylate monomer mix and a catalysis means to induce polymerization of the monomer, and (b) one to twenty-eight parts dialkyl ketone per parts by weight of the monomer and dialkyl ketone mixture.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the catalysis means comprises a peroxide and accelerator means to cause and promote polymerization at room temperature.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the dialkyl ketone has alkyl groups having one to four carbon atoms.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein the dialkyl ketone is dimethyl ketone.
Claim 6
Dependent Claim
24 words
The composition of claim 1 wherein the alkyl methacrylate monomer mix comprises an alkyl methacrylate has alkyl groups having one to four carbon atoms.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein the alkyl methacrylate is methyl methacrylate.
Claim 8
Dependent Claim
14 words
The composition of claim 1 wherein the acrylic polymer is based on methyl methacrylate.
Claim 9
Dependent Claim
29 words
The composition of claim 1 wherein the weight of the dialkyl ketone is four parts to eighteen parts per hundred parts weight of the monomer and dialkyl ketone mixture.
Claim 10
Dependent Claim
30 words
The composition of claim 1, wherein the weight of the dialkyl ketone is five parts to fourteen parts per hundred arts by weight of the monomer and dialkyl ketone mixture.
Claim 11
Dependent Claim
16 words
The composition of claim 1, wherein the acrylic polymer is in the form of bead powder.
Claim 12
Dependent Claim
63 words
A dental prosthesis composition comprising: (a) a polymerizable composition comprising a methyl methacrylate polymer, an alkyl methacrylate monomer and a catalysis means comprising a peroxide and accelerator to cause and promote polymerization of the monomer at room temperature, and (b) five parts to fourteen parts by weight of dimethyl ketone per one hundred parts of the alkyl methacrylate monomer and dialkyl ketone mixture.
Claim 13
Dependent Claim
63 words
A dental prosthesis composition comprising: (a) a polymerizable composition comprising a methyl methacrylate polymer, an alkyl methacrylate monomer and a catalysis means comprising a peroxide and accelerator to cause and promote polymerization of the monomer at room temperature, and (b) five parts to fourteen parts by weight of dimethyl ketone per one hundred parts of the alkyl methacrylate monomer and dialkyl ketone mixture.
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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |