US2676282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocathode for multiplier tubes
Assignee: RCA Corp
•
Filing: 1951-04-09
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Granted: 1954-04-20
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Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Polkosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/34; H01J40/00; H01J40/02; H01J40/04; H01J40/06; H01J9/00; H01J9/02; H01J9/12; H01J2201/00; H01J2201/34; H01J2201/342; H01J2201/3421; H01J2201/3426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PHOTOSENSITIVE CATHODE COMPRISING, A TRANSPARENT SUPPORT BASE ELEMENT, AN OXIDIZED MANGANESE FILM ON SAID BASE ELEMENT, A DEPOSIT OF ANTIMONY ON SAID OXIDIZED MANGANESE FILM, AND A DEPOSIT OF CESIUM ON SAID ANTIMONY FILM.
Claim 2
Dependent Claim
35 words
A PHOTOSENSITIVE CATHODE COMPRISING, A TRANSPARENT SUPPORT BASE ELEMENT, AN OXIDIZED MANGANESE FILM ON SAID BASE ELEMENT, A DEPOSIT OF ANTIMONY ON SAID OXIDIZED MANGANESE FILM, AND A DEPOSIT OF CESIUM ON SAID ANTIMONY FILM.
References Cited (Backward Citations)
US1906448A
Cited
US2218340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |