US3756947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating waste water containing nitriles latex composition
Assignee: Sumitomo Shipbuilding and Machinery Co Ltd
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Filing: 1971-09-13
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Granted: 1973-09-04
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Expires: 1991-09-13
Abstract
Abstract A WASTE WATER EFFLUENT CONTAINING NITRILES AND CYANIDES IS TREATED BY PASSING THROUGH AN ACCLIMATED, ACTIVATED SLUDGE CONTAINING AT LEAST ONE MICROORGANISMS CAPABLE OF DEGRADING NITRILES AND CYANIDES SELECTED FROM THE GENERA ALCALIGENES AND ACHROMOBACTER, FOR EXAMPLE, ALCALIGENES VISCOLACTIS ATCC 21698 AND ACHROMOBACTER NITRILOCLASTERS ATCC 21697 THEREBY TO PURIFY THE WASTE WATER EFFLUENT. THE WASTE WATER EFFLUENT CONTAINING 10 TO 50 P.P.M. OF CYANIDE AND 1,000 TO 2,500 P.P.M. OF COD (POTASSIUM DICHROMATE METHOD) CAN BE PURIFIED WITH A HIGH EFFICIENCY.
Inventors
- 👤 Y Fujii
- 👤 Oshimi
- 👤 W Buchheim
- 👤 W Bonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:55
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F3/34; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |