Patent US3120597A successfully refreshed from Google Patents.
US3120597A
Expired / Lapsed
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High temperature furnace
Assignee: Baird Atomic Inc
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Filing: 1961-09-27
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Granted: 1964-02-04
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Leon S Maloof
- 👤 Kopito Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:38
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/32; F; F27; F27D; F27D11/00; F27D11/02; H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/145; H05B3/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A HEATING DEVICE EMPLOYING A SECTION OF GRAPHITE FABRIC MOUNTED BETWEEN A PAIR OF CARBON ELECTRODES, A CIRCUIT FOR ENERGIZING SAID FABRIC, COMPRISING A COOLING CONDUIT SERIALLY CONNECTING SAID ELECTRODES, SAID CONDUIT FORMING BETWEEN SAID ELECTRODES A LOOP HAVING AN ELECTRICAL RESISTANCE SUBSTANTIALLY HGIHER THAN THAT OF SAID FABRIC, A VARIABLE POWER SOURCE CONNECTED TO SAID CONDUIT AND A SIGNAL LAMP CONNECTED TO SAID CONDUIT AND HAVING AN ELECTRICAL RESISTANCE INTERMEDIATE IN THAT OF SAID FABRIC AND SAID LOOP.
Claim 2
Dependent Claim
80 words
IN A HEATING DEVICE EMPLOYING A SECTION OF GRAPHITE FABRIC MOUNTED BETWEEN A PAIR OF CARBON ELECTRODES, A CIRCUIT FOR ENERGIZING SAID FABRIC, COMPRISING A COOLING CONDUIT SERIALLY CONNECTING SAID ELECTRODES, SAID CONDUIT FORMING BETWEEN SAID ELECTRODES A LOOP HAVING AN ELECTRICAL RESISTANCE SUBSTANTIALLY HGIHER THAN THAT OF SAID FABRIC, A VARIABLE POWER SOURCE CONNECTED TO SAID CONDUIT AND A SIGNAL LAMP CONNECTED TO SAID CONDUIT AND HAVING AN ELECTRICAL RESISTANCE INTERMEDIATE IN THAT OF SAID FABRIC AND SAID LOOP.
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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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |