US3573986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat activated cell
Assignee: National Aeronautics and Space Administration
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Filing: 1968-12-30
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Granted: 1971-04-06
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Expires: 1988-12-30
Abstract
Abstract A HEAT ACTIVATED ELECTROMOTIVE FORCE (EMF) CELL HAVING AN ANODE FORMED OF ALUMINUM AND A CATHODE COMPRISING AN OXIDIZING MATERIAL SUCH AS SULFUR. THE CATHODE MATERIAL IS SUPPORTED IN A CONTAINER OR IN A MATRIX SUCH AS POROUS CARBON. AN ALUMINUM SALT LAYER ELECTROLYTE SUCH AS ALCL SEPARATES THE ANODE FROM THE CATHODE. TO MINIMIZE VAPORIZATION OF THE ALUMINUM SALT, AN ALKALI HALIDE SALT MAY BE MIXED THEREWITH. THE CELL MAY BE OPERATED AT TEMPERATURES UP TO POINT WHERE EITHER THE CATHODE MATERIAL OR THE ELECTROLYTE IS MOLTEN.
Inventors
- 👤 Jacob Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:03
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |