Patent US3225237A successfully refreshed from Google Patents.
US3225237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoemissive pickup tube
Assignee: RCA Corp
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Filing: 1961-06-01
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Granted: 1965-12-21
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Expires: 1981-06-01
Abstract
No abstract record available.
Inventors
- 👤 Cope Appleton Danforth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:34
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A TELEVISION CAMERA TUBE COMPRISING AN ELONGATED ENVELOPE, AN ELECTRON GUN IN ONE END OF SAID ENVELOPE, A PHOTOCATHODE IN THE OTHER END OF SAID ENVELOPE, A TARGET ELECTRODE BETWEEN SAID ELECTRON GUN AND SAID PHOTOCATHODE AND IN SAID ENVELOPE, A SEPARATION ELECTRODE BETWEEN SAID ELECTRON GUN AND SAID TARGET ELECTRODE AND WITHIN SAID ENVELOPE, AND AT LEAST THREE ELECTRICALLY SEPARATE STEERING ELECTRODES BETWEEN SAID SEPARATION ELECTRODE AND SAID TARGET ELECTRODE AND WITHIN SAID ENVELOPE, SAID STEERING ELECTRODES BEING FINGER-LIKE STRUCTURES EXTENDING IN A PLANE NORMAL TO THE AXIS OF THE ENVELOPE.
Claim 2
Dependent Claim
92 words
A TELEVISION CAMERA TUBE COMPRISING AN ELONGATED ENVELOPE, AN ELECTRON GUN IN ONE END OF SAID ENVELOPE, A PHOTOCATHODE IN THE OTHER END OF SAID ENVELOPE, A TARGET ELECTRODE BETWEEN SAID ELECTRON GUN AND SAID PHOTOCATHODE AND IN SAID ENVELOPE, A SEPARATION ELECTRODE BETWEEN SAID ELECTRON GUN AND SAID TARGET ELECTRODE AND WITHIN SAID ENVELOPE, AND AT LEAST THREE ELECTRICALLY SEPARATE STEERING ELECTRODES BETWEEN SAID SEPARATION ELECTRODE AND SAID TARGET ELECTRODE AND WITHIN SAID ENVELOPE, SAID STEERING ELECTRODES BEING FINGER-LIKE STRUCTURES EXTENDING IN A PLANE NORMAL TO THE AXIS OF THE ENVELOPE.
References Cited (Backward Citations)
US2365006A
Cited
US2747133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |