Patent US3744977A successfully refreshed from Google Patents.
US3744977A
Expired / Lapsed
US
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Apparatus for treating cyanide wastes
Assignee: Franke Plating Works Inc
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Filing: 1971-03-05
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Granted: 1973-07-10
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Expires: 1991-03-05
Abstract
Abstract AN APPARATUS FOR CONVERTING CYANIDE WASTES INTO SODIUM CYANIDE IN WHICH A HEAT EXCHANGER IS INTERCONNECTED BETWEEN A PLURALITY OF REACTION TANKS AND A FIRST TOWER ADAPTED TO HOLD A CHARGE OR SODIUM HYDROXIDE. SAID TOWER IS INTERCONNECTED TO ONE COMPARTMENT OF A CHAMBERED TANK, AND A SECOND COMPARTMENT IN SAID TANK IS CONNECTED TO A SECOND TOWER ADAPTED TO HOLD A CHARGE OF SODIUM HYDROXIDE. A PUMPING ASSEMBLY IS PROVIDED FOR WITHDRAWING THE SODIUM CYANIDE FROM THE FIRST COMPARTMENT AND FOR RECYCLING THE REACTION MIXTURE THROUGH THE TOWERS AND THE COMPARTMENTED TANK.
Inventors
- 👤 L Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:28
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/08; C01C3/10; Y; Y10; Y10S; Y10S204/00; Y10S204/13; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904; Y10S588/00; Y10S588/90
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |