US3226465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature kiln
Assignee: Elkem Metals Co LP
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Filing: 1963-05-31
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Granted: 1965-12-28
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 James H Downing
- 👤 Ernest L Koerner
- 👤 Iii James E Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:44
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/06; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A ROTARY KILN COMPRISING A FIRST INNER GRAPHITE TUBE ADAPTED TO CONTAIN A CHARGE OF SOLID MATERIAL HAVING A CHARGE INLET END AND AN OUTLET END; A SECOND OUTER TUBE OF NON-CONDUCTIVE MATERIAL ARRANGED CONCENTRIC WITH AND SPACED FROM THE FIRST TUBE AND IN FIXED RELATION THEREWITH, THE SPACE BETWEEN THE FIRST AND SECOND TUBES BEING CLOSED AND SUBSTANTIALLY FILLED WITH AMORPHOUS CARBON; MEANS COMMUNICATING WITH SAID GRAPHITE TUBE IN A SUBSTANTIALLY GAS-TIGHT CONNECTION FOR INTRODUCING CHARGE MATERIAL INTO SAID GRAPHITE TUBE AT THE INLET END THEREOF SUBSTANTIALLY WITHOUT THE ADMISSION OF AIR TO THE GRAPHITE TUBE; MEANS FOR WITHDRAWING GASES FROM THE GRAPHITE TUBE AT ITS INLET END; MEANS FOR RECOVERING SOLID MATERIAL FROM THE GRAPHITE TUBE AT ITS OUTLET END SUBSTANTIALLY WITHOUT THE ADMISSION OF AIR TO THE GRAPHITE TUBE; MEANS FOR AXIALLY ROTATING THE GRAPHITE TUBE; AND MEANS FOR ELECTRICALLY HEATING THE GRAPHITE TUBE.
Claim 2
Dependent Claim
147 words
A ROTARY KILN COMPRISING A FIRST INNER GRAPHITE TUBE ADAPTED TO CONTAIN A CHARGE OF SOLID MATERIAL HAVING A CHARGE INLET END AND AN OUTLET END; A SECOND OUTER TUBE OF NON-CONDUCTIVE MATERIAL ARRANGED CONCENTRIC WITH AND SPACED FROM THE FIRST TUBE AND IN FIXED RELATION THEREWITH, THE SPACE BETWEEN THE FIRST AND SECOND TUBES BEING CLOSED AND SUBSTANTIALLY FILLED WITH AMORPHOUS CARBON; MEANS COMMUNICATING WITH SAID GRAPHITE TUBE IN A SUBSTANTIALLY GAS-TIGHT CONNECTION FOR INTRODUCING CHARGE MATERIAL INTO SAID GRAPHITE TUBE AT THE INLET END THEREOF SUBSTANTIALLY WITHOUT THE ADMISSION OF AIR TO THE GRAPHITE TUBE; MEANS FOR WITHDRAWING GASES FROM THE GRAPHITE TUBE AT ITS INLET END; MEANS FOR RECOVERING SOLID MATERIAL FROM THE GRAPHITE TUBE AT ITS OUTLET END SUBSTANTIALLY WITHOUT THE ADMISSION OF AIR TO THE GRAPHITE TUBE; MEANS FOR AXIALLY ROTATING THE GRAPHITE TUBE; AND MEANS FOR ELECTRICALLY HEATING THE GRAPHITE TUBE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |