US3402074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy converter
Assignee: Texas Instruments Inc
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Filing: 1964-03-23
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Granted: 1968-09-17
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Richard A Chapman
- 👤 Jr John J Connelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:43
CPC Classifications
H; H01; H01J; H01J45/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A COLLECTOR FOR A THERMIONIC CONVERTER OF THE TYPE HAVING AN EMITTER AND A COLLECTOR WITH CESIUM VAPOR DISPOSED IN THE CLOSED SPACE BETWEEN THE EMITTER AND THE COLLECTOR, SAID COLLECTOR CONSISTING ESSENTIALLY OF AN ELECTRICALLY CONDUCTIVE SUBSTRATE CHEMICALLY STABLE AT HIGH TEMPERATURES COATED WITH A COMPOSITION OF CESIUM AND AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM AND CONTAINING A DONOR IMPURITY FROM GROUP I-A OF THE PERIODIC TABLE OF ELEMENTS IN AN AMOUNT SUFFICIENT TO LOWER THE THERMIONIC WORK FUNCTION OF SAID COMPOSITION.
Claim 2
Dependent Claim
88 words
A COLLECTOR FOR A THERMIONIC CONVERTER OF THE TYPE HAVING AN EMITTER AND A COLLECTOR WITH CESIUM VAPOR DISPOSED IN THE CLOSED SPACE BETWEEN THE EMITTER AND THE COLLECTOR, SAID COLLECTOR CONSISTING ESSENTIALLY OF AN ELECTRICALLY CONDUCTIVE SUBSTRATE CHEMICALLY STABLE AT HIGH TEMPERATURES COATED WITH A COMPOSITION OF CESIUM AND AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM AND CONTAINING A DONOR IMPURITY FROM GROUP I-A OF THE PERIODIC TABLE OF ELEMENTS IN AN AMOUNT SUFFICIENT TO LOWER THE THERMIONIC WORK FUNCTION OF SAID COMPOSITION.
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |