US2677667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the revivification of spent carbonaceous material
Assignee: Colonial Sugar Refining Co Ltd
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Filing: 1951-03-19
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Granted: 1954-05-04
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Expires: 1971-03-19
Abstract
No abstract record available.
Inventors
- 👤 Howarth Peter Francis Wildman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:41
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE REVIVIFICATION OF SPENT CARBONACEOUS ADSORPTIVE MATERIAL WHICH COMPRISES PASSING SUPERHEATED STEAM AT A TEMPERATURE WITHIN THE RANGE OF 800* F.-1100* F. THROUGH THE SPENT MATERIAL FOR 3-4 HOURS, COOLING THE MATERIAL, PASSING GASESCONTAINING CARBON DIOXIDE UP THROUGH THE MATERIAL UNTIL THE PH OF THE MATERIAL IS APPROXIMATELY 7 AND THE CACO3 CONTENT OF THE MATERIAL IS SUBSTANTIALLY EQUIVALENT TO THAT OF THE ORIGINAL CARBONACEOUS ADSORPTIVE MATERIAL AND THOROUGHLY MIXING THE TREATED MATERIAL.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE REVIVIFICATION OF SPENT CARBONACEOUS ADSORPTIVE MATERIAL WHICH COMPRISES PASSING SUPERHEATED STEAM AT A TEMPERATURE WITHIN THE RANGE OF 800* F.-1100* F. THROUGH THE SPENT MATERIAL FOR 3-4 HOURS, COOLING THE MATERIAL, PASSING GASESCONTAINING CARBON DIOXIDE UP THROUGH THE MATERIAL UNTIL THE PH OF THE MATERIAL IS APPROXIMATELY 7 AND THE CACO3 CONTENT OF THE MATERIAL IS SUBSTANTIALLY EQUIVALENT TO THAT OF THE ORIGINAL CARBONACEOUS ADSORPTIVE MATERIAL AND THOROUGHLY MIXING THE TREATED MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |