Patent US3730849A successfully refreshed from Google Patents.
US3730849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral calcined coke cooler
Assignee: Marathon Oil Co
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Filing: 1970-11-13
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Granted: 1973-05-01
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Expires: 1990-11-13
Abstract
Abstract A HEAT EXCHANGER, E.G., A SERIES OF TRANSVERSE HEATCONDUCTIVE CONDUITS THROUGH WHICH FLUIDS CIRCULATES, OR A CONVENTIONAL WASTE HEAT BOILER, OR A WATER SPRAY CAN BE INCROPORATED INTO A SOAKING PIT IN A ROTARY HEARTH CALCINING FURNACE. THE SOAKING PIT CAN ALSO BE MADE INTEGRAL WITH THE FLUE.
Inventors
- 👤 V Allred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:15
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/08; C10B; C10B39/00; C10B39/02; C10B7/00; C10B7/02
Claims Analysis
Total Claims: 0
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |