Patent US3687665A successfully refreshed from Google Patents.
US3687665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing cathode ray storage tube target
Assignee: Tektronix Inc
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Filing: 1969-12-01
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Granted: 1972-08-29
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Expires: 1989-12-01
Abstract
Abstract A CATHODE RAY STORAGE TUBE IS PROVIDED WITH A STORAGE TARGET HAVING A MULTIPLICITY OF COLLECTOR ELECTRODES EXTENDING THROUGH THE STORAGE TARGET''S DIELECTRIC LAYER. THESE COLLECTOR ELECTRODES ACT TO COLLECT SECONDARY ELECTRONS AND CONTROL THE ELECTRIC FIELD CONFIGURATION NEAR THE SURFACE OF THE STORAGE TARGET FOR THE PREVENTION OF TRACE SHADOWING. THE TARGET IS MANUFACTURED BY A PHOTO-ETCHING PROCESS WHEREIN AN INSULATING SUBSTRATE BODY IS COATED WITH METAL WHICH IS ETCHED TO A DOT PATTERN. THE INSULATIING SUBSTRATE IS THEN ETCHED RESULTING IN CONICAL SHAPED PROTRUSIONS WHICH ARE PROVIDED WITH A CONDUCTIVE LAYER AND SURROUNDED WITH DIELECTRIC MATERIAL.
Inventors
- 👤 Roger A Frankland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:25
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/41
Claims Analysis
Total Claims: 0
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |