US3774305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting acrylic resins and their use as binders in dental filling compositions
Assignee: Individual
•
Filing: 1972-07-14
•
Granted: 1973-11-27
•
Expires: 1992-07-14
Abstract
Abstract Bisphenol-A-bis(2,3-dimethacrylatopropyl ether) and the adduct of methacrylic acid and triglycidyl ether of trihydroxy biphenyl are utilized as binders for dental restorative compositions.
Inventors
- 👤 D Stoffey
- 👤 H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/20; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
A method as claimed in claim 1 wherein R and R1 are hydrogen.
Claim 2
Dependent Claim
14 words
A method as claimed in claim 1 wherein R and R1 are lower alkyl.
Claim 3
Dependent Claim
13 words
A method as claimed in claim 1 wherein R and R1 are methyl.
Claim 4
Dependent Claim
66 words
In a method for the direct filling of a cavity in a tooth, which method includes filling said cavity with an initially liquid, settable filling material comprising a finely divided filler and a binder admixed therewith, and thereafter permitting said material to harden in situ, the improvement in such method comprising utilizing as the predominant component of said binder a thermosetting resin compound of the formula:
Claim 5
Dependent Claim
11 words
A method as claimed in claim 5 wherein R is hydrogen.
Claim 6
Dependent Claim
12 words
A method as claimed in claim 5 wherein R is lower alkyl.
Claim 7
Dependent Claim
11 words
A method as claimed in claim 5 wherein R is methyl.
References Cited (Backward Citations)
US3559288A
Cited
US3452437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |