US2621151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal and the like
Assignee: INGENIORSBYRAN FREDCA AB
•
Filing: 1948-03-10
•
Granted: 1952-12-09
•
Expires: 1968-03-10
Abstract
No abstract record available.
Inventors
- 👤 Carlsson Fredrik
- 👤 Eklund Elis Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:50
CPC Classifications
C; C10; C10B; C10B7/00; C10B7/06; Y; Y10; Y10S; Y10S208/00; Y10S208/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
A PROCESS FOR DRY DISTILLATION OF BITUMINOUS OIL SHALE, COAL, BROWN COAL AND OTHER CARBONACEOUS MATERIAL, WHICH IS CONVEYED THROUGH A TUNNEL OVEN AT THE SAME TIME AS THE DISTILLATION GASES ARE FORCED AFTER HEATING TO CIRCULATE RIGHT THROUGH THE MATERIAL, WHICH INCLUDES THE STEPS OF CONTINUOUSLY CONVEYING LAYERS OF CARBONACEOUS MATERIAL THROUGH THREE ZONES FORMED IN THE OVEN, VARYING THE SPEED OF CONVERGANCE OF EACH LAYER THROUGH THE ZONES SO THAT THE LAYER BEING CONVEYED THROUGH THE SECOND OF SAID ZONES WILL BE CONVEYED AT A SPEED HIGHER THAN THAT OF THE LAYER BEING CONVEYED THROUGH THE FIRST OF SAID ZONES AND THE LAYER BEING CONVEYED THROUGH THE THIRD ZONE WILL BE CONVEYED AT A SPEED LOWER THAN THAT OF THE LAYER BEING CONVEYED THROUGH THE SECOND OF SAID ZONES AND THUS ALSO AUTOMATICALLY VARYING THE THICKNESS OF THE LAYERS IN EACH ZONE SO THAT THE LAYER IN THE SECOND OF SAID ZONE WILL BE OF A THICKNESS LESS THAN THAT OF THE LAYER IN THE FIRST OF SAID ZONES AND THE LAYER IN THE THIRD OF SAID ZONES WILL BE OF A THICKNESS GREATER THAN THAT OF THE LAYER IN THE SECOND OF SAID ZONES, SUCH VERIANCE OF THE SPEED OF CONVEYANCE AND THICKNESS OF THE LAYERS BEING MADE IN ACCORDANCE WITH THE CONDITIONS OF THE CARBONACEOUS MATERIAL IN THE ZONES.
Claim 2
Dependent Claim
223 words
A PROCESS FOR DRY DISTILLATION OF BITUMINOUS OIL SHALE, COAL, BROWN COAL AND OTHER CARBONACEOUS MATERIAL, WHICH IS CONVEYED THROUGH A TUNNEL OVEN AT THE SAME TIME AS THE DISTILLATION GASES ARE FORCED AFTER HEATING TO CIRCULATE RIGHT THROUGH THE MATERIAL, WHICH INCLUDES THE STEPS OF CONTINUOUSLY CONVEYING LAYERS OF CARBONACEOUS MATERIAL THROUGH THREE ZONES FORMED IN THE OVEN, VARYING THE SPEED OF CONVERGANCE OF EACH LAYER THROUGH THE ZONES SO THAT THE LAYER BEING CONVEYED THROUGH THE SECOND OF SAID ZONES WILL BE CONVEYED AT A SPEED HIGHER THAN THAT OF THE LAYER BEING CONVEYED THROUGH THE FIRST OF SAID ZONES AND THE LAYER BEING CONVEYED THROUGH THE THIRD ZONE WILL BE CONVEYED AT A SPEED LOWER THAN THAT OF THE LAYER BEING CONVEYED THROUGH THE SECOND OF SAID ZONES AND THUS ALSO AUTOMATICALLY VARYING THE THICKNESS OF THE LAYERS IN EACH ZONE SO THAT THE LAYER IN THE SECOND OF SAID ZONE WILL BE OF A THICKNESS LESS THAN THAT OF THE LAYER IN THE FIRST OF SAID ZONES AND THE LAYER IN THE THIRD OF SAID ZONES WILL BE OF A THICKNESS GREATER THAN THAT OF THE LAYER IN THE SECOND OF SAID ZONES, SUCH VERIANCE OF THE SPEED OF CONVEYANCE AND THICKNESS OF THE LAYERS BEING MADE IN ACCORDANCE WITH THE CONDITIONS OF THE CARBONACEOUS MATERIAL IN THE ZONES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |