US3746555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a dental cement and product produced thereby
Assignee: Indiana University Foundation Inc
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Filing: 1971-06-07
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Granted: 1973-07-17
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Expires: 1991-06-07
Abstract
Abstract A DENTAL CEMENT HAVING IMPROVED ANTICARIOGENIC AND CEMENT SOLUBILITY CHARACTERISTICS MAY BE PRODUCED BY INCORPORATING UP TO ABOUT 20% STANNOUS FLUORIDE (SNF2), STANNOUS HEXAFLUOROZIRCONATE (SNZRF6), INDIUM FLUOROZIRCONATE (INZRF7), ZIRCONIUM HEXAFLUOROGERMANATE (ZR(GEF6(2), ZIRCONYL HEXAFLUOROGERMANATE (ZROGEF6), OR INDIUM HEXAFLUOROGERMANATE (IN2(GEF6)3) IN A DENTAL CEMENT POWDER CONTAINING SUBSTANTIALLY NO MAGNESIUM OXIDE (MGO) AFTER THE POWDER HAS BEEN HEAT-TREATED (I.E., SINTERED) AND PROCESSED TO ITS DESIRED PARTICLE SIZE. THE DENTAL CEMENT POWDER IS HEAT-TREATED IN THE PRESENCE OF AN OXIDE OF TIN AS A CONDENSING AGENT PRIOR TO THE ADDITION OF THE FLUORIDE COMPOUND.
Inventors
- 👤 J Muhler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:36
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/60; A61K6/69; A61K6/80; A61K6/849; A61K6/864
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |