Patent US3725267A successfully refreshed from Google Patents.
US3725267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Softening of sea water by addition of barium carbonate and co2
Assignee: INTERIOR
•
Filing: 1972-02-14
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Granted: 1973-04-03
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Expires: 1992-02-14
Abstract
Abstract TO REDUCE OR PREVENT SCALING DURING DISTILLATION, BARIUM CARBONATE AND SMALL, CATALYTIC AMOUNTS OF CO2 ARE ADDED TO SEA WATER TO FORM BARIUM BICARBONATE IN SITU WHICH RAPIDLY REACTS WITH SULFATE AND CALCIUM, AND FORMS PRECIPITATE CONSISTING ESSENTIALLY OF BARIUM SULFATE AND CALCIUMN CARBONATE. THE SOFTENED WATER CAN THEN BE HEATED TO PRECIPITATE OUT MAGNESIUM HYDROXIDE.
Inventors
- 👤 P Gelblum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:06
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/02; C02F1/00; C02F1/02; C02F1/04; C02F1/042; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 0
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References 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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |