US3248181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of concentrating salt-water by double salt precipitation
Assignee: Kurita Ind Co Ltd
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Filing: 1962-06-13
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Granted: 1966-04-26
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Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 Akimoto Shinkichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:59
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/06; B; B01; B01D; B01D1/00; B01D1/26; B01D3/00; B01D3/06; B01D3/065; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A PROCESS FOR PREPARING A CONCENTRATED SODIUM CHLORIDE SOLUTION, THE COMBINATION COMPRISING THE STEPS OF MIXING SEA WATER WITH ABOUT A 20% SODIUM CHLORIDE SOLUTION, CONTROLLING THE RESULTANT MIXED SOLUTION SO THAT THE CONCENTRATION OF THE SODIUM ION IS IN THE RANGE OF FROM THREE TO FOUR NORMALLY OF CONCENTRATION TO THE SODIUM ION CONCENTRATION OF THE SEA WATER, AND EVAPORATING THE MIXED SOLUTION AT A TEMPERATURE BETWEEN 75*C. AND 110* C. TO PRECIPITATE A DOUBLE SALT OF CASO4 AND NA2SO4.
Claim 2
Dependent Claim
82 words
IN A PROCESS FOR PREPARING A CONCENTRATED SODIUM CHLORIDE SOLUTION, THE COMBINATION COMPRISING THE STEPS OF MIXING SEA WATER WITH ABOUT A 20% SODIUM CHLORIDE SOLUTION, CONTROLLING THE RESULTANT MIXED SOLUTION SO THAT THE CONCENTRATION OF THE SODIUM ION IS IN THE RANGE OF FROM THREE TO FOUR NORMALLY OF CONCENTRATION TO THE SODIUM ION CONCENTRATION OF THE SEA WATER, AND EVAPORATING THE MIXED SOLUTION AT A TEMPERATURE BETWEEN 75*C. AND 110* C. TO PRECIPITATE A DOUBLE SALT OF CASO4 AND NA2SO4.
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |