Patent US2955991A successfully refreshed from Google Patents.
US2955991A
Expired / Lapsed
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Apparatus for heating agglutinating coal
Assignee: Wood Associates Inc
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Filing: 1955-02-24
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Granted: 1960-10-11
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Expires: 1975-02-24
Abstract
No abstract record available.
Inventors
- 👤 Harold G Tufty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:34
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/08; C10B7/00; C10B7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A CONTINUOUS APPARATUS ADAPTED FOR HEATING FINELY DIVIDED AGGLUTINATING COAL UNDER NON-COMBUSTING BUT AGGLUTINATING CONDITIONS COMPRISING A CLOSED RETORT, AN ENDLESS CONVEYOR MOUNTED FOR MOVEMENT WITHIN SAID RETORT, MEANS FOR FEEDING TWO STREAMS OF GRANULAR NON-AGGLUTINATING MATERIAL TO SAID RETORT, MEANS FOR PRE-HEATING SAID NON-AGGLUTINATING MATERIAL BEING FED TO A TEMPERATURE ABOVE THE AGGLUTINATING POINT OF THE COAL, MEANS FOR SPREADING ONE OF SAID STREAMS OF NON-AGGLUTINATING MATERIAL INTO A THIN LAYER ON SAID CONVEYOR ADJACENT ONE END THEREOF, MEANS FOR FEEDING A STREAM OF THE COAL TO SAID RETORT, MEANS WITHIN SAID RETORT FOR EFFECTING UNCONFINED CO-MINGLING OF SAID COAL STREAM AND SAID OTHER STREAM OF NON-AGGLUTINATING MATERIAL IN THE OPEN SPACE ABOVE SAID CONVEYOR WITHIN THE RETORT AND FOR DEPOSITING THE CO-
Claim 2
Dependent Claim
124 words
A CONTINUOUS APPARATUS ADAPTED FOR HEATING FINELY DIVIDED AGGLUTINATING COAL UNDER NON-COMBUSTING BUT AGGLUTINATING CONDITIONS COMPRISING A CLOSED RETORT, AN ENDLESS CONVEYOR MOUNTED FOR MOVEMENT WITHIN SAID RETORT, MEANS FOR FEEDING TWO STREAMS OF GRANULAR NON-AGGLUTINATING MATERIAL TO SAID RETORT, MEANS FOR PRE-HEATING SAID NON-AGGLUTINATING MATERIAL BEING FED TO A TEMPERATURE ABOVE THE AGGLUTINATING POINT OF THE COAL, MEANS FOR SPREADING ONE OF SAID STREAMS OF NON-AGGLUTINATING MATERIAL INTO A THIN LAYER ON SAID CONVEYOR ADJACENT ONE END THEREOF, MEANS FOR FEEDING A STREAM OF THE COAL TO SAID RETORT, MEANS WITHIN SAID RETORT FOR EFFECTING UNCONFINED CO-MINGLING OF SAID COAL STREAM AND SAID OTHER STREAM OF NON-AGGLUTINATING MATERIAL IN THE OPEN SPACE ABOVE SAID CONVEYOR WITHIN THE RETORT AND FOR DEPOSITING THE CO-
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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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |