Patent US3721644A successfully refreshed from Google Patents.
US3721644A
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Thermosetting acrylic resins and their use as binders in dental filling compositions
Assignee: Lee Pharmaceuticals Inc
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Filing: 1970-12-28
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Granted: 1973-03-20
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Expires: 1990-12-28
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
2026-11-02 11:47
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/20; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |