Patent US3204142A successfully refreshed from Google Patents.
US3204142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickup tube having photoconductive target
Assignee: US Philips Corp
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Filing: 1960-09-14
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Granted: 1965-08-31
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Expires: 1980-09-14
Abstract
No abstract record available.
Inventors
- 👤 Haan Edward Fokko De
- 👤 Rooy Antonius Johannes De
- 👤 Barten Piet Gerard Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:31
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/40; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45; H01J31/50; H01J31/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
AN IMAGE SIGNAL GENERATING TUBE COMPRISING A SOURCE OF AN ELECTRON BEAM, A TARGET ELECTRODE IN SPACED RELATIONSHIP TO SAID SOURCE AND ARANGED IN THE PATH OF SAID BEAM, SAID TARGET ELECTRODE COMPRISING A FIRST ELECTRODE COMPRISING A PLURALITY OF CONDUCTIVE PORTIONS SPACED APART IN A PLANE, A SECOND ELECTRODE SPACED FROM SAID FIRST ELECTRODE, AT LEAST ONE OF SAID ELECTRODES HAVING A SURFACE EXPOSED TO SAID ELECTRON BEAM, AND VARIABLE RESISTANCE MEANS INTERPOSED BETWEEN SAID ELECTRODES AND COMPRISING A FIRST COMPONENT HAVING A RELATIVELY FIXED RESISTANCE VALUE AND A SECOND COMPONENT IN SERIES CIRCUIT RELATIONSHIP TO SAID FIRST COMPONENT, SAID SECOND COMPONENT HAVING A VARIABLE RESISTANCE VALUE AND COMPRISING A PHOTOCONDUCTIVE MATERIAL AT LEAST A PORTION OF WHICH IS ALIGNED WITH THE SPACES BETWEEN ADJACENT PORTIONS OF SAID FIRST ELECTRODE, SAID PHOTO-CONDUCTIVE COMPONENT UNDERGOING LOCALIZED CHANGES IN ELECTRICAL CONDUCTIVITY UPON IMPINGEMENT OF ELECXTRO-
Claim 2
Dependent Claim
144 words
AN IMAGE SIGNAL GENERATING TUBE COMPRISING A SOURCE OF AN ELECTRON BEAM, A TARGET ELECTRODE IN SPACED RELATIONSHIP TO SAID SOURCE AND ARANGED IN THE PATH OF SAID BEAM, SAID TARGET ELECTRODE COMPRISING A FIRST ELECTRODE COMPRISING A PLURALITY OF CONDUCTIVE PORTIONS SPACED APART IN A PLANE, A SECOND ELECTRODE SPACED FROM SAID FIRST ELECTRODE, AT LEAST ONE OF SAID ELECTRODES HAVING A SURFACE EXPOSED TO SAID ELECTRON BEAM, AND VARIABLE RESISTANCE MEANS INTERPOSED BETWEEN SAID ELECTRODES AND COMPRISING A FIRST COMPONENT HAVING A RELATIVELY FIXED RESISTANCE VALUE AND A SECOND COMPONENT IN SERIES CIRCUIT RELATIONSHIP TO SAID FIRST COMPONENT, SAID SECOND COMPONENT HAVING A VARIABLE RESISTANCE VALUE AND COMPRISING A PHOTOCONDUCTIVE MATERIAL AT LEAST A PORTION OF WHICH IS ALIGNED WITH THE SPACES BETWEEN ADJACENT PORTIONS OF SAID FIRST ELECTRODE, SAID PHOTO-CONDUCTIVE COMPONENT UNDERGOING LOCALIZED CHANGES IN ELECTRICAL CONDUCTIVITY UPON IMPINGEMENT OF ELECXTRO-
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |