US3278423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of aqueous crude effluent liquors from coal carbonizing plants
Assignee: Woodall Duckham Construction Co Ltd
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Filing: 1964-09-17
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Granted: 1966-10-11
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Expires: 1984-09-17
Abstract
No abstract record available.
Inventors
- 👤 Millar Jan Michael Courtney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:57
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/10; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1231; C02F9/00; C02F1/00; C02F1/20; C02F1/28; C02F1/283; C02F1/52; C02F1/5236; C02F1/66; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR THE TREATMENT OF AQUEOUS CRUDE EFFUENT LIQUORS FROM COAL CARBONISING PLANTS, WHICH COMPRISES DISTILLING SAID CRUDE LIQUOR TO REMOVE AT LEAST THE MAJOR PART OF THE FREE AMMONIA, SUBJECTING THE RESULTING CRUDE WASTE LIQUOR TO BIOCHEMICAL OXIDATION, ADDING LIME TO THE THUS TREATED CRUDE WASTE LIQUOR TO CONVERT THE FIXED AMMONIA SALTS TO FREE AMMONIA SALTS, SEPARATING ALL OR SUBSTANTIALLY ALL THE SOLIDS FROM THE LIMED CRUDE WASTE LIQUOR, AND THEN DISTILLING THE SUPERNATANT LIQUOR TO REMOVE THE AMMONIA SALTS.
Claim 2
Dependent Claim
83 words
A PROCESS FOR THE TREATMENT OF AQUEOUS CRUDE EFFUENT LIQUORS FROM COAL CARBONISING PLANTS, WHICH COMPRISES DISTILLING SAID CRUDE LIQUOR TO REMOVE AT LEAST THE MAJOR PART OF THE FREE AMMONIA, SUBJECTING THE RESULTING CRUDE WASTE LIQUOR TO BIOCHEMICAL OXIDATION, ADDING LIME TO THE THUS TREATED CRUDE WASTE LIQUOR TO CONVERT THE FIXED AMMONIA SALTS TO FREE AMMONIA SALTS, SEPARATING ALL OR SUBSTANTIALLY ALL THE SOLIDS FROM THE LIMED CRUDE WASTE LIQUOR, AND THEN DISTILLING THE SUPERNATANT LIQUOR TO REMOVE THE AMMONIA SALTS.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |