US3275869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low noise electron emitters
Assignee: Raytheon Co
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Filing: 1963-07-12
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Granted: 1966-09-27
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Expires: 1983-07-12
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang M Feist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:46
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/34; H01J23/00; H01J23/02; H01J23/04; H01J2201/00; H01J2201/34; H01J2201/342; H01J2201/3421; H01J2201/3423; H01J2201/3426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A LOW NOISE ELECTRON EMITTER COMPRISING A CATHODE HAVING A LAYER OF MATERIAL RESPONSIVE TO ELECTROMAGNETIC RADIATION FOR EMITTING ELECTRONS, SAID MATERIAL BEING SUBSTANTIALLY NON-RESPONSIVE TO RADIATION AT WAVELENGTHS ABOVE A THRESHOLD WAVELENGTH, SAID ELECTRON EMITTER FURTHER COMPRISING MEANS FOR PRODUCING ELECTROMAGNETIC RADIATION OVER A RANGE OF WAVELENGTHS, SAID MEANS BEING ALIGNED WITH SAID CATHODE, THE SHORTEST WAVELENGTH PRODUCED BY SAID MEANS BEING LESS THAN SAID THRESHOLD WAVELENGTH OF SAID LAYER OF ELECTRON EMITTING MATERIAL AND SAID SHORTEST WAVELENGTH BEING LIMITED WITH RESPECT TO SAID THRESHOLD WAVELENGTH TO LIMIT THE MAXIMUM ENERGY DIFFERENCE BETWEEN ELECTRONS EMITTED FROM SAID LAYER OF ELECTRON EMITTING MATERIAL.
Claim 2
Dependent Claim
103 words
A LOW NOISE ELECTRON EMITTER COMPRISING A CATHODE HAVING A LAYER OF MATERIAL RESPONSIVE TO ELECTROMAGNETIC RADIATION FOR EMITTING ELECTRONS, SAID MATERIAL BEING SUBSTANTIALLY NON-RESPONSIVE TO RADIATION AT WAVELENGTHS ABOVE A THRESHOLD WAVELENGTH, SAID ELECTRON EMITTER FURTHER COMPRISING MEANS FOR PRODUCING ELECTROMAGNETIC RADIATION OVER A RANGE OF WAVELENGTHS, SAID MEANS BEING ALIGNED WITH SAID CATHODE, THE SHORTEST WAVELENGTH PRODUCED BY SAID MEANS BEING LESS THAN SAID THRESHOLD WAVELENGTH OF SAID LAYER OF ELECTRON EMITTING MATERIAL AND SAID SHORTEST WAVELENGTH BEING LIMITED WITH RESPECT TO SAID THRESHOLD WAVELENGTH TO LIMIT THE MAXIMUM ENERGY DIFFERENCE BETWEEN ELECTRONS EMITTED FROM SAID LAYER OF ELECTRON EMITTING MATERIAL.
References Cited (Backward Citations)
US3048797A
Cited
US3036234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |