Patent US2531137A successfully refreshed from Google Patents.
US2531137A
Expired / Lapsed
US
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Preparation of sulfuric acid and sodium chloride from sodium sulfate solutions
Assignee: Individual
•
Filing: 1947-02-01
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Granted: 1950-11-21
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Expires: 1967-02-01
Abstract
No abstract record available.
Inventors
- 👤 Laubi Otto
- 👤 Gerber Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:16
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/745; C01D; C01D3/00; C01D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS PRODUCING SULPHURIC ACID AND SODIUM CHLORIDE, INCLUDIG THE STEPS OF INTRODUCING SULPHUR DIOXIDE AND CHLORINE INTO AN AQUEOUS SOLUTION OF SODIUM SULPHATE IN WHICH THE REACTION IS CARRIED OUT AT TEMPERATURES WHICH DO NOT EXCEED 100 DEGREES CENTIGRADE.
Claim 2
Dependent Claim
40 words
A PROCESS PRODUCING SULPHURIC ACID AND SODIUM CHLORIDE, INCLUDIG THE STEPS OF INTRODUCING SULPHUR DIOXIDE AND CHLORINE INTO AN AQUEOUS SOLUTION OF SODIUM SULPHATE IN WHICH THE REACTION IS CARRIED OUT AT TEMPERATURES WHICH DO NOT EXCEED 100 DEGREES CENTIGRADE.
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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |