Patent US2433554A successfully refreshed from Google Patents.
Patent US3279028A successfully refreshed from Google Patents.
US3279028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing thermionic energy converter tube
Assignee: RCA Corp
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Filing: 1964-05-01
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Granted: 1966-10-18
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Expires: 1984-05-01
Abstract
No abstract record available.
Inventors
- 👤 William B Hall
- 👤 Robert F Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:40
CPC Classifications
H; H01; H01J; H01J45/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF MAKING A THERMIONIC ENERGY CONVERTER AND SAID ELEMENT WITH CLOSE AND UNIFORM SPACING THEREBETWEEN; TUBE INCLUDING A THERMIONIC EMITTER OF REFRACTORY METAL THERMALLY AND MECHANICALLY BONDED TO BUT ELECTRICALLY (B) SUPPORTING A QUANTITY OF REFRACTORY HEAT CONDUCTING CERAMIC MATERIAL AT ONE BOUNDARY OF THE SPACE BEINSULATED FROM A REFRACTORY METAL HEATED TRANSFER ELEMENT OF SIMILAR SHAPE COMPRISING THE STEPS OF: TWEEN SAID EMITTER AND ELEMENT; (C) HEATING THE ASSEMBLY OF SAID EMITTER, ELEMENT AND (A) TELESCOPICALLY AND VERTICALLY SUPPORTING SAID EMITTER MATERIAL IN A NON-OXIDIZING ATMOSPHERE TO A TEMPERATURE SUFFICIENT TO MELT SAID MATERIAL AND CAUSE IT TO FLOW BY CAPILLARY ACTION INTO AND FILL SAID SPACE; AND (D) COOLING SAID ASSEMBLY TO SOLIDIFY SAID CERAMIC MATERIAL AND FORM A BOND BETWEEN SAID EMITTER AND ELEMENT.
Claim 2
Independent Claim
129 words
A METHOD OF MAKING A THERMIONIC ENERGY CONVERTER AND SAID ELEMENT WITH CLOSE AND UNIFORM SPACING THEREBETWEEN; TUBE INCLUDING A THERMIONIC EMITTER OF REFRACTORY METAL THERMALLY AND MECHANICALLY BONDED TO BUT ELECTRICALLY (B) SUPPORTING A QUANTITY OF REFRACTORY HEAT CONDUCTING CERAMIC MATERIAL AT ONE BOUNDARY OF THE SPACE BEINSULATED FROM A REFRACTORY METAL HEATED TRANSFER ELEMENT OF SIMILAR SHAPE COMPRISING THE STEPS OF: TWEEN SAID EMITTER AND ELEMENT; (C) HEATING THE ASSEMBLY OF SAID EMITTER, ELEMENT AND (A) TELESCOPICALLY AND VERTICALLY SUPPORTING SAID EMITTER MATERIAL IN A NON-OXIDIZING ATMOSPHERE TO A TEMPERATURE SUFFICIENT TO MELT SAID MATERIAL AND CAUSE IT TO FLOW BY CAPILLARY ACTION INTO AND FILL SAID SPACE; AND (D) COOLING SAID ASSEMBLY TO SOLIDIFY SAID CERAMIC MATERIAL AND FORM A BOND BETWEEN SAID EMITTER AND ELEMENT.
References Cited (Backward Citations)
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |