US3141834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuous destructive distillation and carbonization of coal
Assignee: Marathon Oil Co
•
Filing: 1961-01-25
•
Granted: 1964-07-21
•
Expires: 1981-01-25
Abstract
No abstract record available.
Inventors
- 👤 Allred Victor Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:36
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A PROCESS FOR THE DESTRUCTION DISTILLATION OF COAL WHEREIN COAL IS INTRODUCED INTO ONE END OF A RETORT, COKE IS FORMED AND REMOVED FROM THE OTHER END OF THE RETORT, AND A COMBUSTION ZONE IS MAINTAINED INTERMEDIATE THE RETORT CHARGE OF INTRODUCED COAL AND FORMED COKE, THE STEPS OF INTRODUCING COAL AND AN OXYGEN-CONTAINING GAS INTO A RETORT INCOCURRENT RELATIONSHIP AT A RATE ADAPTED TO MAINTAIN A COMBUSTION ZONE OF LIMITED VERTICAL EXTENT, REGULATING THE RATE OF COAL AND GAS INTRODUCTION INTO THE COMBUSTION ZONE TO MAINTAIN SAID ZONE INTERMEDIATE THE ENDS OF THE CHARGE, BURNING A MINOR PORTION OF THE COAL AND ALL OXYGEN IN SAID COMBUSTION ZONE, MAINTAINING THE TEMPERATURE OF THE COAL SUBSTANTIALLY AT COKING TEMPERATURES WITH-
Claim 2
Dependent Claim
121 words
IN A PROCESS FOR THE DESTRUCTION DISTILLATION OF COAL WHEREIN COAL IS INTRODUCED INTO ONE END OF A RETORT, COKE IS FORMED AND REMOVED FROM THE OTHER END OF THE RETORT, AND A COMBUSTION ZONE IS MAINTAINED INTERMEDIATE THE RETORT CHARGE OF INTRODUCED COAL AND FORMED COKE, THE STEPS OF INTRODUCING COAL AND AN OXYGEN-CONTAINING GAS INTO A RETORT INCOCURRENT RELATIONSHIP AT A RATE ADAPTED TO MAINTAIN A COMBUSTION ZONE OF LIMITED VERTICAL EXTENT, REGULATING THE RATE OF COAL AND GAS INTRODUCTION INTO THE COMBUSTION ZONE TO MAINTAIN SAID ZONE INTERMEDIATE THE ENDS OF THE CHARGE, BURNING A MINOR PORTION OF THE COAL AND ALL OXYGEN IN SAID COMBUSTION ZONE, MAINTAINING THE TEMPERATURE OF THE COAL SUBSTANTIALLY AT COKING TEMPERATURES WITH-
References Cited (Backward Citations)
US1781766A
Cited
US1536696A
Cited
US1772189A
Cited
US1669024A
Cited
GB468405A
Cited
US2501153A
Cited
US2723225A
Cited
US2954329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |