US3340382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-cell electrical heater
Assignee: ARC O VEC Inc
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Filing: 1965-05-03
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Granted: 1967-09-05
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Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Lennox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:41
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/78; H05B3/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN ELECTRIC HEATER COMPRISING AN ELONGATED TUBULAR, METALLIC OUTER SHEATH MEANS, ENCLOSING AND HAVING METALLIC CONTACT WITH A PLURALITY OF METALLIC TUBULAR HEATER SHEATHS EACH CONTAINING A RESISTANCE HEATING ELEMENT EMBEDDED IN A COMPACTED, NON-CONDUCTIVE, MINERAL MASS THEREIN, AND A METALLIC, TUBULAR SHEATH CONTAINING A HEAT RESPONSIVE SENSOR WITHIN SAID OUTER SHEATH MEANS AND MAINTAINED IN METALLIC CONTACT WITH A LEAST ONE OF SAID HEATER SHEATHS AND CONTAINING MEANS ELECTRICALLY RESPONSIVE TO HEAT PRODUCED BY SAID RESISTANCE HEATING ELEMENTS, AND TERMINAL MEANS PROJECTING BEYOND AT LEAST ONE END OF SAID OUTER SHEATH MEANS FOR CONNECTING TO APPROPRIATE SOURCES OF ELECTRICAL ENERGY.
Claim 2
Dependent Claim
101 words
AN ELECTRIC HEATER COMPRISING AN ELONGATED TUBULAR, METALLIC OUTER SHEATH MEANS, ENCLOSING AND HAVING METALLIC CONTACT WITH A PLURALITY OF METALLIC TUBULAR HEATER SHEATHS EACH CONTAINING A RESISTANCE HEATING ELEMENT EMBEDDED IN A COMPACTED, NON-CONDUCTIVE, MINERAL MASS THEREIN, AND A METALLIC, TUBULAR SHEATH CONTAINING A HEAT RESPONSIVE SENSOR WITHIN SAID OUTER SHEATH MEANS AND MAINTAINED IN METALLIC CONTACT WITH A LEAST ONE OF SAID HEATER SHEATHS AND CONTAINING MEANS ELECTRICALLY RESPONSIVE TO HEAT PRODUCED BY SAID RESISTANCE HEATING ELEMENTS, AND TERMINAL MEANS PROJECTING BEYOND AT LEAST ONE END OF SAID OUTER SHEATH MEANS FOR CONNECTING TO APPROPRIATE SOURCES OF ELECTRICAL ENERGY.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |