US4553941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetal and hemiacetal dentin and enamel adhesive primers
Assignee: 3M Co
•
Filing: 1984-10-19
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Granted: 1985-11-19
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Expires: 2004-10-19
Abstract
Abstract Acetals and hemiacetals are used as primers for dentin and enamel adhesives.
Inventors
- 👤 Steven M. Aasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
20 words
A primer-coated dentin surface comprising a layer of a liquid primer composition comprising acetal or hemiacetal adjacent said dentin surface.
Claim 2
Dependent Claim
20 words
A primer-coated dentin surface comprising a layer of a liquid primer composition comprising acetal or hemiacetal adjacent said dentin surface.
Claim 3
Dependent Claim
13 words
A primer-coated dentin surface according to claim 1, wherein said primer comprises acetal.
Claim 4
Dependent Claim
13 words
A primer-coated dentin surface according to claim 2, wherein said acetal comprises 2,5-dimethoxy-2,5-dihydrofuran.
Claim 5
Dependent Claim
13 words
A primer-coated dentin surface according to claim 1, wherein said primer comprises hemiacetal.
Claim 6
Dependent Claim
15 words
A primer-coated dentin surface according to claim 4, wherein said hemiacetal comprises glucaronic acid 3,6-lactone.
Claim 7
Dependent Claim
21 words
A primer-coated dentin surface according to claim 1, wherein said acetal or hemiacetal has at least one methacryloyl or acryloyl substituent.
Claim 8
Dependent Claim
27 words
A primer-coated dentin surface according to claim 1, wherein said acetal or hemiacetal contains one or more cyclic groups capable of ring opening when used on teeth.
Claim 9
Independent Claim
50 words
A method for repairing, adhering to, or altering the position of a tooth, comprising the steps of (a) applying to dentin on said tooth a layer of a liquid primer composition comprising acetal or hemiacetal, (b) overcoating said layer with a dentin or enamel adhesive, and (c) curing said adhesive.
Claim 10
Independent Claim
50 words
A method for repairing, adhering to, or altering the position of a tooth, comprising the steps of (a) applying to dentin on said tooth a layer of a liquid primer composition comprising acetal or hemiacetal, (b) overcoating said layer with a dentin or enamel adhesive, and (c) curing said adhesive.
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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |