US3179735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance heated furnace
Assignee: —
•
Filing: —
•
Granted: 1965-04-20
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/03; H05B3/62; F; F27; F27D; F27D11/00; F27D11/02; H05B3/60; F27D99/00; F27D99/0001; F27D99/0006; F27D2099/0008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
IN AN ELECTRICALLY HEATED FURNACE HAVING SIDE WALLS AND A BOX-LIKE HEAT GENERATING COMPARTMENT INCLUDING A RECTANGULAR TOP, BOTTOM, END WALLS, AND SIDE WALLS HAVING MEANS FOR PASSING ELECTRODES THERETHROUGH, THE HEAT GENERATING COMPARTMENT BEING DISPOSED WITHIN SAID FURNACE BETWEEN SAID SIDE WALLS, THE SIDE WALLS HAVING MEANS FOR PASSING ELECTRODES THERETHROUGH, SAID MEANS BEING DISPOSED IN PREDETERMINED RELATIONSHIP WITH RESPECT TO SAID MEANS FOR PASSING ELECTRODES THROUGH THE SIDE WALLS OF THE HEAT GENERATING COMPARTMENT, THE IMPROVEMENT COMPRISING A HEATING ELECTRODE ASSEMBLY INCLUDING AT LEAST ONE PAIR OF PLANKLIKE GRAPHITE ELECTRODES HAVING REDUCED THICKNESS AT ONE END, ONE OF SAID ELECTRODES EXTENDING THROUGH SAID SIDE WALL OF THE FURNACE AND HEAT GENERATING COMPARTMENT FROM EACH SIDE THEREOF, SAID ELECTRODES BEING IN END TO END CONTACT AT THEIR REDUCED THICKNESS ENDS, SAID ELECTRODES BEING DISPOSED AGAINST THE BOTTOM OF SAID HEAT GENERATING COMPARTMENT AT THEIR ENDS HAVING REDUCED THICKNESS, MEANS FOR COUPLING AN ELECTRICAL LEAD TO EACH OF SAID ELECTRODES, AND MEANS FOR URGING SAID ELECTRODES AGAINST ONE ANOTHER UNDER PREDETERMINED PRESSURE.
Claim 2
Dependent Claim
172 words
IN AN ELECTRICALLY HEATED FURNACE HAVING SIDE WALLS AND A BOX-LIKE HEAT GENERATING COMPARTMENT INCLUDING A RECTANGULAR TOP, BOTTOM, END WALLS, AND SIDE WALLS HAVING MEANS FOR PASSING ELECTRODES THERETHROUGH, THE HEAT GENERATING COMPARTMENT BEING DISPOSED WITHIN SAID FURNACE BETWEEN SAID SIDE WALLS, THE SIDE WALLS HAVING MEANS FOR PASSING ELECTRODES THERETHROUGH, SAID MEANS BEING DISPOSED IN PREDETERMINED RELATIONSHIP WITH RESPECT TO SAID MEANS FOR PASSING ELECTRODES THROUGH THE SIDE WALLS OF THE HEAT GENERATING COMPARTMENT, THE IMPROVEMENT COMPRISING A HEATING ELECTRODE ASSEMBLY INCLUDING AT LEAST ONE PAIR OF PLANKLIKE GRAPHITE ELECTRODES HAVING REDUCED THICKNESS AT ONE END, ONE OF SAID ELECTRODES EXTENDING THROUGH SAID SIDE WALL OF THE FURNACE AND HEAT GENERATING COMPARTMENT FROM EACH SIDE THEREOF, SAID ELECTRODES BEING IN END TO END CONTACT AT THEIR REDUCED THICKNESS ENDS, SAID ELECTRODES BEING DISPOSED AGAINST THE BOTTOM OF SAID HEAT GENERATING COMPARTMENT AT THEIR ENDS HAVING REDUCED THICKNESS, MEANS FOR COUPLING AN ELECTRICAL LEAD TO EACH OF SAID ELECTRODES, AND MEANS FOR URGING SAID ELECTRODES AGAINST ONE ANOTHER UNDER PREDETERMINED PRESSURE.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |