US2758968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of coke oven and similar effluents
Assignee: Permutit Co Ltd
•
Filing: 1953-12-14
•
Granted: 1956-08-14
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Williams Thomas Henry
- 👤 Solt George Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:47
CPC Classifications
B; B01; B01J; B01J41/00; B01D; B01D15/00; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN A PROCESS FOR PURIFYING A COKE OVEN EFFLUENT OR SIMILAR AQUEOUS LIQUOR, THE SUCCESSIVE STEPS WHICH COMPRISE PASSING SAID LIQUOR THROUGH A BED OF AN ALKALI-ACTIVATED ANION-EXCHANGE MATERIAL HAVING PORES THAT ARE SUFFICIENTLY LARGE TO PERMIT ENTRY ANIONS OF COLOURING MATTER CONTAINED IN THE LIQUOR TREATED, AND THEREAFTER TREATING SAID LIQUOR WITH ACTIVATED CARBON.
Claim 2
Dependent Claim
55 words
IN A PROCESS FOR PURIFYING A COKE OVEN EFFLUENT OR SIMILAR AQUEOUS LIQUOR, THE SUCCESSIVE STEPS WHICH COMPRISE PASSING SAID LIQUOR THROUGH A BED OF AN ALKALI-ACTIVATED ANION-EXCHANGE MATERIAL HAVING PORES THAT ARE SUFFICIENTLY LARGE TO PERMIT ENTRY ANIONS OF COLOURING MATTER CONTAINED IN THE LIQUOR TREATED, AND THEREAFTER TREATING SAID LIQUOR WITH ACTIVATED CARBON.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |