US2668778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a photo emitter
Assignee: General Electric Co
•
Filing: 1952-01-10
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Granted: 1954-02-09
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Expires: 1972-01-10
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Taft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:03
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF FORMING A PHOTO EMITTER WHICH COMPRISES DEPOSITING A LAYER OF ELEMENTAL TELLURIUM ON A CONDUCTING BASE MATERIAL, AND CONTACTING SAID TELLURIUM LAYER UNDER VACUUM WITH A VAPOR OF A METAL SELECTED FROM THE GROUP CONSISTING OF CESIUM AND RUBIDIUM UNTIL SAID VAPOR HAS REACTED IN STOICHIOMETRIC QUANTITIES WITH SAID TELLURIUM.
Claim 2
Independent Claim
53 words
THE METHOD OF FORMING A PHOTO EMITTER WHICH COMPRISES DEPOSITING A LAYER OF ELEMENTAL TELLURIUM ON A CONDUCTING BASE MATERIAL, AND CONTACTING SAID TELLURIUM LAYER UNDER VACUUM WITH A VAPOR OF A METAL SELECTED FROM THE GROUP CONSISTING OF CESIUM AND RUBIDIUM UNTIL SAID VAPOR HAS REACTED IN STOICHIOMETRIC QUANTITIES WITH SAID TELLURIUM.
References Cited (Backward Citations)
US2218340A
Cited
US2529883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |