US2924508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of production of stannous fluoride
Assignee: Ozark-Mahoning Co
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Filing: 1956-09-20
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Granted: 1960-02-09
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Expires: 1976-09-20
Abstract
No abstract record available.
Inventors
- 👤 Joe E Gilliland
- 👤 Wayne E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:03
CPC Classifications
C; C01; C01G; C01G19/00; C01G19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A METHOD OF PRODUCING STANNOUS FLUORIDE, THE STEPS OF MIXING RELATIVELY FINELY DIVIDED METALLIC TIN AND LIQUID, AT LEAST SUBSTANTIALLY ANHYDROUS HYDROFLUORIC ACID IN A REACTION STEP, MAINTAINING THE REACTION MIXTURE AT A SUBSTANTIALLY UNIFORM TEMPERATURE NOT GREATER THAN THE BOILING POINT OF THE LIQUID PRESENT IN THE REACTION STEP BY MAINTAINING A SUFFICIENT QUANTITY OF LIQUID HYDROFLUORIC ACID CONTINUOUSLY PRESENT IN THE REACTION STEP AND IN CONTACT WITH THE TIN REACTING IN THE REACTION STEP WHEREBY TO SUBSTANTIALLY PREVENT ANY AGGLOMERATION OF TIN INTO INREACTIVE METALLIC BODIES IN SAID REACTION STEP DUE TO FUSION TOGETHER THEREOF IN THE PRESENCE OF EXCESS HEAT, AND RECOVERING STANNOUS FLUORIDE FROM THE RESULTANT SOLUTION.
Claim 2
Dependent Claim
112 words
IN A METHOD OF PRODUCING STANNOUS FLUORIDE, THE STEPS OF MIXING RELATIVELY FINELY DIVIDED METALLIC TIN AND LIQUID, AT LEAST SUBSTANTIALLY ANHYDROUS HYDROFLUORIC ACID IN A REACTION STEP, MAINTAINING THE REACTION MIXTURE AT A SUBSTANTIALLY UNIFORM TEMPERATURE NOT GREATER THAN THE BOILING POINT OF THE LIQUID PRESENT IN THE REACTION STEP BY MAINTAINING A SUFFICIENT QUANTITY OF LIQUID HYDROFLUORIC ACID CONTINUOUSLY PRESENT IN THE REACTION STEP AND IN CONTACT WITH THE TIN REACTING IN THE REACTION STEP WHEREBY TO SUBSTANTIALLY PREVENT ANY AGGLOMERATION OF TIN INTO INREACTIVE METALLIC BODIES IN SAID REACTION STEP DUE TO FUSION TOGETHER THEREOF IN THE PRESENCE OF EXCESS HEAT, AND RECOVERING STANNOUS FLUORIDE FROM THE RESULTANT SOLUTION.
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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |