US3146183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for mixing tar-decanter sludge with coke oven feed coal
Assignee: Republic Steel Corp
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Filing: 1961-05-25
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Granted: 1964-08-25
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Expires: 1981-05-25
Abstract
No abstract record available.
Inventors
- 👤 William A Reed
- 👤 John M Roblin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:10
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/04; C10B57/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR CONVERTING TAR-DECANTER SLUDGE TO USEFUL PRODUCTS COMPRISING THE STEPS OF PREMIXING SAID SLUDGE AT A TEMPERATURE OF AT LEAST 40*C. TO GIVE A PREMIX OF 8-15% SLUDGE WITH A PORTION OF THE COMMINUTED COAL BEING USED AS FEED FOR A COKE OVEN, UNIFORMLY DISTRIBUTING SAID PRE-MIX THROUGH THE MAIN BODY OF SAID COAL CHARGE, AND THEREFTER COKING THE RESULTANT MIXTURE OF COAL AND SLUDGE.
Claim 2
Dependent Claim
67 words
A PROCESS FOR CONVERTING TAR-DECANTER SLUDGE TO USEFUL PRODUCTS COMPRISING THE STEPS OF PREMIXING SAID SLUDGE AT A TEMPERATURE OF AT LEAST 40*C. TO GIVE A PREMIX OF 8-15% SLUDGE WITH A PORTION OF THE COMMINUTED COAL BEING USED AS FEED FOR A COKE OVEN, UNIFORMLY DISTRIBUTING SAID PRE-MIX THROUGH THE MAIN BODY OF SAID COAL CHARGE, AND THEREFTER COKING THE RESULTANT MIXTURE OF COAL AND SLUDGE.
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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |