US2589301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric melting furnace
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1949-06-07
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Granted: 1952-03-18
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Expires: 1969-06-07
Abstract
No abstract record available.
Inventors
- 👤 Smith Arthur Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
C; C22; C22B; C22B4/00; H; H05; H05B; H05B3/00; H05B3/62; H05B3/64; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
IN AN ELECTRIC MELTING FURNACE FOR METALS AND THEIR ALLOYS HAVING A BOTTOM ADAPTED TO SUPPLY HEAT TO THE FURNACE AND THE CONTENTS THEREOF, A HEAT ABSORBING AND CONDUCTING BLOCK POSITIONED WITHIN THE BOTTOM OF THE FURNACE, SAID BLOCK HAVING A CONTINUOUS EXTERIOR SUPPORTING SURFACE NORMALLY ADAPTED TO THE SUBMERGED IN MOLTEN METAL AND OUT OF CONTACT WITHTHE FURNACE ATMOSPHERE, MEANS FOR HEATING SAID BLOCK, SAID MEANS COMPRISING AN ELECTRIC HEATING ELEMENT EMBEDDED WITHIN AND SUBSTANTIALLY IN COMPLETE CONTACT WITH SAID BLOCK, WHENCE HEAT IS THEN TRANSMITTED BY CONDUCTION TO THE MOLTEN METAL IN SAID FURNACE, AND MEANS FOR INTRODUCING A GASEOUS FLUXING AGENT INTO SAID FURNACE, SAID MEANS CONSISTING OF A POROUS BLOCK LOCATED ADJACENT SAID BLOCK OF HEAT-ABSORBING AND CONDUCING MATERIAL.
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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) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |