US2520915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sodium chlorite
Assignee: Diamond Shamrock Corp
•
Filing: 1945-04-26
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Granted: 1950-09-05
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Expires: 1965-04-26
Abstract
No abstract record available.
Inventors
- 👤 George L Cunningham
- 👤 Pretka Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:48
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/08; C01B11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR PREPARING SODIUM CHLORITE SUBSTANTIALLY UNCONTAMINATED WITH SODIUM CHLORATE, THE STEPS OF FORMING A SOLUTION CONTAINING IN ADMIXTURE SODIUM IONS, CHLORITE IONS, CHLORATE IONS, AND POTASSIUM IONS DERIVED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF POTASSIUM HYDROXIDE AND POTASSIUM CHLORITE, EVAPORATING SAID SOLUTION UNDER REDUCED PRESSURE AT A TEMPERATURE BELOW ABOUT 70*C. TO OBTAIN THE PRECIPITATION OF POTASSIUM CHLORATE, SEPARATELY RECOVERING SAID POTASSIUM CHLORATE, AND THEN FURTHER EVAPORATING SAID SOLUTION UNDER REDUCED PRESSURE AND AT A TEMPERATURE BELOW ABOUT 70* C. TO PRECIPITATE SUBSTANTIALLY ANHYDROUS SODIUM CHLORITE.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR PREPARING SODIUM CHLORITE SUBSTANTIALLY UNCONTAMINATED WITH SODIUM CHLORATE, THE STEPS OF FORMING A SOLUTION CONTAINING IN ADMIXTURE SODIUM IONS, CHLORITE IONS, CHLORATE IONS, AND POTASSIUM IONS DERIVED FROM A COMPOUND SELECTED FROM THE GROUP CONSISTING OF POTASSIUM HYDROXIDE AND POTASSIUM CHLORITE, EVAPORATING SAID SOLUTION UNDER REDUCED PRESSURE AT A TEMPERATURE BELOW ABOUT 70*C. TO OBTAIN THE PRECIPITATION OF POTASSIUM CHLORATE, SEPARATELY RECOVERING SAID POTASSIUM CHLORATE, AND THEN FURTHER EVAPORATING SAID SOLUTION UNDER REDUCED PRESSURE AND AT A TEMPERATURE BELOW ABOUT 70* C. TO PRECIPITATE SUBSTANTIALLY ANHYDROUS SODIUM CHLORITE.
References Cited (Backward Citations)
US2031681A
Cited
US2169066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |