Patent US2880344A successfully refreshed from Google Patents.
US2880344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: RCA Corp
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Filing: 1951-03-02
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Granted: 1959-03-31
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 Stoudenheimer Richard George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:26
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PHOTOSENSITIVE CATHODE COMPRISING, A TRANSPARENT SUPPORTING BASE ELEMENT, AN OXIDIZED FILM ON SAID BASED ELEMENT, THE METAL OF SAID FILM BEING ONE FROM THE GROUP CONSISTING OF IRON, NICKLE, COBALT AND CHROMIUM, A DEPOSIT OF ANTIMONY ON SAID OXIDIZED METAL FILM AND A DEPOSIT OF CESIUM ON SAID ANTIMONY FILM.
Claim 2
Dependent Claim
51 words
A PHOTOSENSITIVE CATHODE COMPRISING, A TRANSPARENT SUPPORTING BASE ELEMENT, AN OXIDIZED FILM ON SAID BASED ELEMENT, THE METAL OF SAID FILM BEING ONE FROM THE GROUP CONSISTING OF IRON, NICKLE, COBALT AND CHROMIUM, A DEPOSIT OF ANTIMONY ON SAID OXIDIZED METAL FILM AND A DEPOSIT OF CESIUM ON SAID ANTIMONY FILM.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |