US3716740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocathode with photoemitter activation controlled by diode array
Assignee: AT&T Inc
•
Filing: 1970-09-18
•
Granted: 1973-02-13
•
Expires: 1990-09-18
Abstract
Abstract THE SPECIFICATION DESCRIBES A NEW TYPE OF PHOTOCATHODE COMPRISING A SEMICONDUCTOR DIODE-ARRAY LIGHT SENSING ELEMENT IN COMBINATION WITH A PHOTOEMISSIVE COATING. THE SPATIAL PATTERN OF ELECTRON EMISSION FROM THE PHOTOEMITTER IS CONTROLLED BY THE LOCALIZED FIELD IN THE DIODE ARRAY. THE LOCAL INTENSITY OF THIS FIELD GIVES A SPATIAL REPRESENTATION OF THE IMAGE INCIDENT ON THE DIODE ARRAY. WITH A SILICON DIODE ARRAY INFRARED AND X-RAY RESPONSE ARE INHERENT.
Inventors
- 👤 M Crowell
- 👤 E Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |