US5334625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restorative dental adhesive composition
Assignee: Den Mat Holdings LLC
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Filing: 1991-10-10
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Granted: 1994-08-02
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Expires: 2011-10-10
Abstract
Abstract An adhesive composition useful for restoration comprising a finely-divided reinforcing filler, a polymerizable matrix material, a bonding agent, a coupling agent, and a thermal initiator.
Inventors
- 👤 Robert L. Ibsen
- 👤 Donald R. Pacropis
- 👤 William R. Glace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:09
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
An adhesive composition useful for dental restoration consisting essentially of: (a) a finely-divided, from about 0.005 to about 500 microns, reinforcing filler; (b) a methacrylate-functional resin; (c) a bonding agent selected from the group consisting of (i) N-phenylglycin, the alkali metal salt thereof, or the mixture of the foregoing two compounds, (ii) the adduct of N(P-tolyl) glycine and glycidyl methacrylate, the alkali metal salt thereof, or the mixture of the foregoing two compounds, (iii) the adduct of N-phenylglycine and glycidyl, the adduct of bisphenol A and glycidyl methacrylate, the alkali metal salt thereof, or the mixture of the foregoing two compounds, and N-(p-tolyl) glycine; (d) a coupling agent selected from the group consisting of (i) the adduct of pyromellitic acid dianhydride and 2-hydroxyethylmethacrylate, (ii) the adduct of 3,3'4,4'-benzophenonetetracarboxylic dianhydride and 2-hydroxyethyl methacrylate, and (iii) 4-methacryloxyethyltrimellitic; and (e) a thermal initiator.
Claim 2
Dependent Claim
140 words
An adhesive composition useful for dental restoration consisting essentially of: (a) a finely-divided, from about 0.005 to about 500 microns, reinforcing filler; (b) a methacrylate-functional resin; (c) a bonding agent selected from the group consisting of (i) N-phenylglycin, the alkali metal salt thereof, or the mixture of the foregoing two compounds, (ii) the adduct of N(P-tolyl) glycine and glycidyl methacrylate, the alkali metal salt thereof, or the mixture of the foregoing two compounds, (iii) the adduct of N-phenylglycine and glycidyl, the adduct of bisphenol A and glycidyl methacrylate, the alkali metal salt thereof, or the mixture of the foregoing two compounds, and N-(p-tolyl) glycine; (d) a coupling agent selected from the group consisting of (i) the adduct of pyromellitic acid dianhydride and 2-hydroxyethylmethacrylate, (ii) the adduct of 3,3'4,4'-benzophenonetetracarboxylic dianhydride and 2-hydroxyethyl methacrylate, and (iii) 4-methacryloxyethyltrimellitic; and (e) a thermal initiator.
Claim 3
Dependent Claim
26 words
The composition according to claim 1, wherein the finely-divided reinforcing filler is selected from the group consisting of porcelain, ceramic fibers, zirconium oxide and borosilicate glass.
Claim 4
Dependent Claim
43 words
The composition according to claim 1, wherein the polymerizable matrix material is selected from the group consisting of ethoxylated bisphenol A dimethacrylate, adduct of bisphenol A and glycidyl methacrylate, and the mixture of either of the foregoing two compounds with bisphenol A dimethacrylate.
Claim 5
Dependent Claim
19 words
The composition according to claim 1, wherein the bonding agent is sodium adduct of N(P-tolyl) glycine and glycidyl methacrylate.
Claim 6
Dependent Claim
19 words
The composition according to claim 1, wherein the coupling agent is an adduct of pyromellitic acid dianhydride and 2-hyroxyethylmethacrylate.
Claim 7
Dependent Claim
13 words
The composition according to claim 1, wherein the thermal initiator is benzoyl peroxide.
Claim 8
Dependent Claim
10 words
The composition according to claim 1, further comprising a photoinitiator.
Claim 9
Dependent Claim
21 words
The composition according to claim 7, wherein the photoinitiator is a photosensitive exciplex donor-acceptor combination of 2,3-bornanedione and ethyl 4-dimethylamino benzoate.
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) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |