US3149246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric generators
Assignee: AT&T Inc
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Filing: 1958-10-10
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Granted: 1964-09-15
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Expires: 1978-10-10
Abstract
No abstract record available.
Inventors
- 👤 Warren P Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:21
CPC Classifications
H; H10; H10N; H10N15/00; H10N15/10; H10N15/15; H10N15/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A THERMOELECTRIC GENERATOR COMPRISING AN ELEMENT OF A MATERIAL SELECTED FROM THE CLASS CONSISTING OF BARIUM TITANATE, A MIXTURE OF BARIUM AND STRONTIUM TITANATES, POTASSIUM NIOBATE, A MIXTURE OF SODIUM AND POTASSIUM NIOBATES, LEAD TITANATE ZIRCONATE, AND LEAD TITANATE, THE MATERIAL HAVING A CURIE TEMPERATURE AT WHICH A TRANSITION FROM A POLARIZED TO AN UNPOLARIZED STATE AND VICE VERSA TAKES PLACE AS THE TEMPERATURE OF THE ELEMENT IS VARIED ALTERNATELY IN OPPOSITE DIRECTIONS THROUGH A RANGE INCLUDING THE CURIE TEMPERATURE, MEANS FOR ABSTRACTING HEAT FROM THE ELEMENT, ELECTRICAL COUPLING MEANS FOR ESTABLISHING AN ELECTRICAL COUPLING TO THE ELEMENT, A UTILIZATION CIRCUIT ELECTRICALLY CONNECTED TO THE ELECTRICAL COUPLING MEANS, AND MEANS FOR INTERMITTENTLY APPLYING HEAT TO THE ELEMENT SUFFICIENT TO RAISE THE TEMPERATURE OF THE ELEMENT ABOVE ITS CURIE TEMPERATURE DURING PERIODS OF HEAT APPLICATION AND INSUFFICIENT TO MAINTAIN THE ELEMENT ABOVE ITS CURIE TEMPERATURE DURING THE INTERVAL BETWEEN SUCCESSIVE HEAT APPLICATION PERIODS, WHEREBY ELECTRICAL ENERGY IS GENERATED IN THE COUPLING MEANS FOR UTILIZATION IN THE UTILIZATION CIRCUIT.
Claim 2
Dependent Claim
167 words
A THERMOELECTRIC GENERATOR COMPRISING AN ELEMENT OF A MATERIAL SELECTED FROM THE CLASS CONSISTING OF BARIUM TITANATE, A MIXTURE OF BARIUM AND STRONTIUM TITANATES, POTASSIUM NIOBATE, A MIXTURE OF SODIUM AND POTASSIUM NIOBATES, LEAD TITANATE ZIRCONATE, AND LEAD TITANATE, THE MATERIAL HAVING A CURIE TEMPERATURE AT WHICH A TRANSITION FROM A POLARIZED TO AN UNPOLARIZED STATE AND VICE VERSA TAKES PLACE AS THE TEMPERATURE OF THE ELEMENT IS VARIED ALTERNATELY IN OPPOSITE DIRECTIONS THROUGH A RANGE INCLUDING THE CURIE TEMPERATURE, MEANS FOR ABSTRACTING HEAT FROM THE ELEMENT, ELECTRICAL COUPLING MEANS FOR ESTABLISHING AN ELECTRICAL COUPLING TO THE ELEMENT, A UTILIZATION CIRCUIT ELECTRICALLY CONNECTED TO THE ELECTRICAL COUPLING MEANS, AND MEANS FOR INTERMITTENTLY APPLYING HEAT TO THE ELEMENT SUFFICIENT TO RAISE THE TEMPERATURE OF THE ELEMENT ABOVE ITS CURIE TEMPERATURE DURING PERIODS OF HEAT APPLICATION AND INSUFFICIENT TO MAINTAIN THE ELEMENT ABOVE ITS CURIE TEMPERATURE DURING THE INTERVAL BETWEEN SUCCESSIVE HEAT APPLICATION PERIODS, WHEREBY ELECTRICAL ENERGY IS GENERATED IN THE COUPLING MEANS FOR UTILIZATION IN THE UTILIZATION CIRCUIT.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |