US2685531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive electron-emissive electrode
Assignee: General Electric Co
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Filing: 1949-06-13
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Granted: 1954-08-03
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Expires: 1969-06-13
Abstract
No abstract record available.
Inventors
- 👤 Rodda Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:12
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12681; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PHOTO-EMISSIVE ELEMENT COMPRISING A BASE MEMBER HAVING ON A SURFACE THEREOF A LAYER OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY AND BISMUTH, A LAYER THEREON OF A METAL SELECTED FROM THE GROUP CONSISTING OF CESIUM AND RUBIDIUM AND INCLUDING A SMALL QUANTITY OF A METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM AND BARIUM.
Claim 2
Dependent Claim
57 words
A PHOTO-EMISSIVE ELEMENT COMPRISING A BASE MEMBER HAVING ON A SURFACE THEREOF A LAYER OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY AND BISMUTH, A LAYER THEREON OF A METAL SELECTED FROM THE GROUP CONSISTING OF CESIUM AND RUBIDIUM AND INCLUDING A SMALL QUANTITY OF A METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM AND BARIUM.
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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |