Patent US3258409A successfully refreshed from Google Patents.
US3258409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing coke
Assignee: Individual
•
Filing: 1962-07-05
•
Granted: 1966-06-28
•
Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Schenck Hermann
- 👤 Wenzel Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:26
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A COKE PRODUCING PROCESS, WHEREIN A LAYER OF FINEGRAINED BITUMINOUS METAL IS IGNITED ON A GRATE AND AN OXYGEN-CONTAINING GAS FLOW IS PASSED THROUGH THE LAYER, THE IMPROVEMENT WHICH COMPRISES FORMING ESSENTAILLY VERTICALLY EXTENDING FLOW PASSAGES IN SAID LAYER PRIOR TO IGNITION BY MOVING A PASSAGE FORMING MEANS THROUGH THE BITUMINUOUS MATERIAL AND IGNITING SAID LAYER BY PASSING THROUGH SAID LAYER A HOT GASEOUS MEDIUM HAVING, DURING THE PASSAGE THROUGH SAID LAYER, A TEMPERATURE SUFFICIENT TO CAUSE RAPID IGNITION OF SAID LAYER, AND PASSING COMBUSTION AIR THROUGH SAID LAYER AFTER IGNITION THEREOF BY SAID HOT GASEOUS MEDIUM.
Claim 2
Dependent Claim
98 words
IN A COKE PRODUCING PROCESS, WHEREIN A LAYER OF FINEGRAINED BITUMINOUS METAL IS IGNITED ON A GRATE AND AN OXYGEN-CONTAINING GAS FLOW IS PASSED THROUGH THE LAYER, THE IMPROVEMENT WHICH COMPRISES FORMING ESSENTAILLY VERTICALLY EXTENDING FLOW PASSAGES IN SAID LAYER PRIOR TO IGNITION BY MOVING A PASSAGE FORMING MEANS THROUGH THE BITUMINUOUS MATERIAL AND IGNITING SAID LAYER BY PASSING THROUGH SAID LAYER A HOT GASEOUS MEDIUM HAVING, DURING THE PASSAGE THROUGH SAID LAYER, A TEMPERATURE SUFFICIENT TO CAUSE RAPID IGNITION OF SAID LAYER, AND PASSING COMBUSTION AIR THROUGH SAID LAYER AFTER IGNITION THEREOF BY SAID HOT GASEOUS MEDIUM.
References Cited (Backward Citations)
US955970A
Cited
US1593208A
Cited
US2029762A
Cited
GB735026A
Cited
GB783179A
Cited
US2945259A
Cited
US2958902A
Cited
US2997426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |