Patent US3038475A successfully refreshed from Google Patents.
US3105166A
Expired / Lapsed
US
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Electron tube with a cold emissive cathode
Assignee: Westinghouse Electric Corp
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Filing: 1959-01-15
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Granted: 1963-09-24
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Expires: 1979-01-15
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang J Choyke
- 👤 Lyle A Patrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:41
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/308
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
AN ELECTRON TUBE COMPRISING AN ELECTRON EMISSIVE SOURCE, A COLLECTING ELECTRODE FOR COLLECTING ELECTRONS EMITTED FROM SAID ELECTRON EMISSIVE SOURCE, SAID ELECTRON EMISSIVE SOURCE COMPRISING A SEMICONDUCTIVE BODY WITH A BULK MATERIAL HAVING AN ELECTRON AFFINITY LESS THAN THREE HALVES OF THE BAND GAP OF THE MATERIAL, MEANS FOR PROVIDING A HIGH INTERNAL ELECTRIC FIELD IN SAID BODY OF MATERIAL SUCH THAT ELECTRONS ARE EXCITED TO ENERGIES GREATER THAN THE ELECTRON AFFINITY OF SAID MATERIAL, AND MEANS FOR ESTABLISHING A POTENTIAL BETWEEN SAID ELECTRON EMISSIVE SOURCE AND SAID COLLECTING ELECTRODE FOR DERIVING AN ELECTRICAL OUTPUT FROM SAID ELECTRON DEVICE.
Claim 2
Dependent Claim
99 words
AN ELECTRON TUBE COMPRISING AN ELECTRON EMISSIVE SOURCE, A COLLECTING ELECTRODE FOR COLLECTING ELECTRONS EMITTED FROM SAID ELECTRON EMISSIVE SOURCE, SAID ELECTRON EMISSIVE SOURCE COMPRISING A SEMICONDUCTIVE BODY WITH A BULK MATERIAL HAVING AN ELECTRON AFFINITY LESS THAN THREE HALVES OF THE BAND GAP OF THE MATERIAL, MEANS FOR PROVIDING A HIGH INTERNAL ELECTRIC FIELD IN SAID BODY OF MATERIAL SUCH THAT ELECTRONS ARE EXCITED TO ENERGIES GREATER THAN THE ELECTRON AFFINITY OF SAID MATERIAL, AND MEANS FOR ESTABLISHING A POTENTIAL BETWEEN SAID ELECTRON EMISSIVE SOURCE AND SAID COLLECTING ELECTRODE FOR DERIVING AN ELECTRICAL OUTPUT FROM SAID ELECTRON DEVICE.
References Cited (Backward Citations)
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US2938141A
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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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |