Silver ammonia fluoride solution and method of its use
Abstract
Abstract A STABLE AQUEOUS SOLUTION OF SILVER AMMONIA FLUORIDE WHICH IS PREPARED BY DISSOLVING SILVER FLUORIDE IN AN AQUEOUS AMMONIA OR INTRODUCING GASEOUS AMMONIA INTO AN AQEOUS SOLUTION OF SILVER FLUORIDE AND ADJUSTING THE SOLUTION TO PH 6.5-9.5. THE SILVER AMMONIA FLUORIDE SOLUTION CAN BE EFFECTIVELY STABILIZED BY ADDITION OF 1-2 W./V. PERCENT OF AMMONIUM FLUORIDE. THE THUS PREPARED SOLUTION IS USEFUL FOR PREVENTION OF DENTAL DISEASES INCLUDING CARIES AND HYPERSENSITIVITY. THERE IS ALSO DISCLOSED A MOUTHPIECE WHICH COMPRISES A HORSESHOE SHAPED BODY MADE OF A SPONGY MATERIAL SATURATED WITH A SILVER AMMONIA FLUORIDE SOLUTION AND A COATING MADE OF A WATER-IMPERMEABLE MATERIAL WHICH COVERS THE OUTER PERIMETER EXCEPT FOR THE SURFACE BEING BROUGHT IN CONTACT WITH AFFECTED PART.
Inventors
- 👤 Reiichi Yamaga
- 👤 Ichiro Yokomizo
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |