US3889385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dental opaquer and method
Assignee: Individual
•
Filing: 1973-10-31
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Granted: 1975-06-17
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Expires: 1993-10-31
Abstract
Abstract Dental methods and compositions are disclosed for improving the adhesion of opaquer compositions to dental metal work and for preventing solvation of the opaquer compositions by the application of methyl methacrylate containing resins for dental restorations.
Inventors
- 👤 Emery W Dougherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:45
CPC Classifications
A; A61; A61C; A61C13/00; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
DENTAL WORK COMPRISING IN COMBINATION A METAL SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF A DENTAL BASE METAL ALLOY, A NOBEL METAL OR A NOBEL METAL ALLOY, A DENTAL OPAQUINING COMPOSITION OVERLYING SAID METAL SUBSTRATE AND COMPRISING A COPOLYMER OF FROM ABOUT 20 TO ABOUT 60 PARTS BY WEIGHT OF ACRYLONITRILE AND FROM ABOUT 40 TO ABOUT 80 PARTS BY WEIGHT OF METHYL METHACRYLATE, AND A DENTAL CROWN AND BARIDGE RESIN COMPRISING METAYL METHACRYLATE OVERLYING SAID DENTAL OPAQUING COMPOSITION.
Claim 2
Dependent Claim
79 words
DENTAL WORK COMPRISING IN COMBINATION A METAL SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF A DENTAL BASE METAL ALLOY, A NOBEL METAL OR A NOBEL METAL ALLOY, A DENTAL OPAQUINING COMPOSITION OVERLYING SAID METAL SUBSTRATE AND COMPRISING A COPOLYMER OF FROM ABOUT 20 TO ABOUT 60 PARTS BY WEIGHT OF ACRYLONITRILE AND FROM ABOUT 40 TO ABOUT 80 PARTS BY WEIGHT OF METHYL METHACRYLATE, AND A DENTAL CROWN AND BARIDGE RESIN COMPRISING METAYL METHACRYLATE OVERLYING SAID DENTAL OPAQUING COMPOSITION.
Claim 3
Independent Claim
89 words
A METHOD OF PREPARING CROWN AND BRIDGE PROSTHESIS COMPRISING THE STEPS OF OPAQUING PREPARED DENTAL BASE METAL ALLOY, NOBEL METAL, OR NOBEL METAL ALLOY DENTAL WORK BY APPLYING A SOLUTION HAVING DISSOLVED THEREIN METHACRYLIC ACID, A COPOLYMER OF FROM ABOUT 20 TO ABOUT 60 PARTS BY WEIGHT OF ACRYLONITRILE AND FROM ABOUT 40 TO ABOUT 80 PARTS BY WEIGHT OF METHYL METHACRYLATE, AND AN ADHESION PROMOTING COMPOUND SELECTED FROM THE GROUP CONSISTING OF CARBETHOXY PROPYL METHYL DIETHOXY SILANE, DIPHENYL DIETHOXY SILANE, DIMETHYL DICHLORO SILANE, AND GAMMA-METHACRYLOXYPROPYLTRIMETHOXYSLIANE HAVING THE FORMULA
Claim 4
Independent Claim
89 words
A METHOD OF PREPARING CROWN AND BRIDGE PROSTHESIS COMPRISING THE STEPS OF OPAQUING PREPARED DENTAL BASE METAL ALLOY, NOBEL METAL, OR NOBEL METAL ALLOY DENTAL WORK BY APPLYING A SOLUTION HAVING DISSOLVED THEREIN METHACRYLIC ACID, A COPOLYMER OF FROM ABOUT 20 TO ABOUT 60 PARTS BY WEIGHT OF ACRYLONITRILE AND FROM ABOUT 40 TO ABOUT 80 PARTS BY WEIGHT OF METHYL METHACRYLATE, AND AN ADHESION PROMOTING COMPOUND SELECTED FROM THE GROUP CONSISTING OF CARBETHOXY PROPYL METHYL DIETHOXY SILANE, DIPHENYL DIETHOXY SILANE, DIMETHYL DICHLORO SILANE, AND GAMMA-METHACRYLOXYPROPYLTRIMETHOXYSLIANE HAVING THE FORMULA
Claim 5
Dependent Claim
19 words
The method of claim 2 wherein the gamma-methacryloxypropyltrimethoxysilane is about 0.01 to 2.0 parts by weight of the composition.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |