US3926795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biological treatment of plant waste streams to remove cyanuric acid
Assignee: Olin Corp
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Filing: 1974-05-23
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Granted: 1975-12-16
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Expires: 1994-05-23
Abstract
Abstract Cyanuric acid is removed from aqueous chemical plant wastes containing it by treatment of the wastes with active bacteria derived from sewage or soils while maintaining relatively anaerobic conditions, supplying nutrients to the system, while preferably holding the pH fairly close to the neutral point (about 5.0 to 8.5) and the temperature close to ambient.
Inventors
- 👤 Jerome Saldick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:57
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F3/28; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
87 words
THE METHHOD OF RAPIDLY DECOMPOSING CYANURIC ACID CONTAINED IN AN AQUEOUS MIXTURE WHICH COMPRISES HOLDING THE AQUEOUS MIXTURE AT A PH OF ABOUT 5.0 TO 8.5 IN CONTACT WITH AN ACTIVE BIOMASS CONTAINING BACTERIA DERIVED FROM NATURAL WATER, SEWAGE OR SOIL, AT LEAST A PORTION OF WHICH BIOMASS IS UNDER ANAEROBIC CONDITIONS, FOR A TIME SUFFICIENT TO HYDROLYZE THE CYANURIC ACID TO CO2 AND AMMONIA, MAINTAINING ENOUGHT NUTTRIENT IN THE MASS TO FEED THE BACTERIA, WHILE MAINTAINING THE MASS AT A TEMPERATURE ABOVE FREEZING AND BELOW 50*C.
Claim 2
Dependent Claim
87 words
THE METHHOD OF RAPIDLY DECOMPOSING CYANURIC ACID CONTAINED IN AN AQUEOUS MIXTURE WHICH COMPRISES HOLDING THE AQUEOUS MIXTURE AT A PH OF ABOUT 5.0 TO 8.5 IN CONTACT WITH AN ACTIVE BIOMASS CONTAINING BACTERIA DERIVED FROM NATURAL WATER, SEWAGE OR SOIL, AT LEAST A PORTION OF WHICH BIOMASS IS UNDER ANAEROBIC CONDITIONS, FOR A TIME SUFFICIENT TO HYDROLYZE THE CYANURIC ACID TO CO2 AND AMMONIA, MAINTAINING ENOUGHT NUTTRIENT IN THE MASS TO FEED THE BACTERIA, WHILE MAINTAINING THE MASS AT A TEMPERATURE ABOVE FREEZING AND BELOW 50*C.
Claim 3
Dependent Claim
15 words
The method of claim 1, in which the temperature is maintained between 5* and 35*C.
References Cited (Backward Citations)
US3654147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |