Patent US3058186A successfully refreshed from Google Patents.
Patent US3334248A successfully refreshed from Google Patents.
US3334248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space charge barrier hot electron cathode
Assignee: Texas Instruments Inc
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Filing: 1965-02-02
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Granted: 1967-08-01
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Stratton Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:58
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/308; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN ELECTRON EMITTING DEVICE COMPRISING A FIRST LAYER OF SEMICONDUCTOR MATERIAL HAVING ELECTRONS ASD MAJORITY CONDUCTION CARRIERS, A SECOND LAYER OF SEMICONDUCTOR MATERIAL HAVING HOLES AS MAJORITY CONDUCTION CARRIERS, A FIRST METAL LAYER ADJACENT TO AND INTERMEDIATE THE TWO SEMICONDUCTOR LAYERS, MEANS FOR PROVIDING A LOW WORK FUNCTION SURFACE ON THE SECOND SEMICONDUCTOR LAYER, MEANS FOR BIASING THE FIRST METAL LAYER POSITIVE WITH RESPECT TO THE FIRST LAYER OF SEMICONDUCTOR MATERIAL, AND MEANS FOR BIASING THE SECOND LAYER OF SEMICONDUCTING MATERIAL POSITIVE WITH RESPECT TO THE FIRST METAL LAYER.
Claim 2
Dependent Claim
89 words
AN ELECTRON EMITTING DEVICE COMPRISING A FIRST LAYER OF SEMICONDUCTOR MATERIAL HAVING ELECTRONS ASD MAJORITY CONDUCTION CARRIERS, A SECOND LAYER OF SEMICONDUCTOR MATERIAL HAVING HOLES AS MAJORITY CONDUCTION CARRIERS, A FIRST METAL LAYER ADJACENT TO AND INTERMEDIATE THE TWO SEMICONDUCTOR LAYERS, MEANS FOR PROVIDING A LOW WORK FUNCTION SURFACE ON THE SECOND SEMICONDUCTOR LAYER, MEANS FOR BIASING THE FIRST METAL LAYER POSITIVE WITH RESPECT TO THE FIRST LAYER OF SEMICONDUCTOR MATERIAL, AND MEANS FOR BIASING THE SECOND LAYER OF SEMICONDUCTING MATERIAL POSITIVE WITH RESPECT TO THE FIRST METAL LAYER.
References Cited (Backward Citations)
US3250966A
Cited
US3121809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |