US2780731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling the luminosity of a phosphor screen
Assignee: Westinghouse Electric Corp
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Filing: 1951-08-24
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Granted: 1957-02-05
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Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Miller Theadore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:12
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/56; C09K11/562; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/182; H01J29/30; H01J29/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
IN COMBINATION WITH MEANS FOR PRODUCING AN ELECTRON BEAM, A SCREEN ON WHICH SAID BEAN IS INCIDENT COMPRISING A LAYER OF CONDUCTIVE MATERIAL TRANSPARENT TO SAID BEAM, A LAYER COMPRISING A PLURALITY OF SULPHIDE PHOSPHOR MATERIALS LUMINESCING IN DIFFERENT COLORS, THE RESPECTIVE LUMINESCENCES OF SAID MATERIALS DIFFERING FROM EACH OTHER WHEN RADIO FREQUENCY ELECTRIC FIELDS OF DIFFERENT FREQUENCIES ARE IMPRESSED ACROSS SAID LAYER, AND MEANS FOR SIMULTANEOUSLY SUBJECTING SAID PHOSPHOR LAYER TO A RADIO FREQUENCY POTENTIAL FIELD BETWEEN SAID LAYER OF CONDUCTIVE MATERIAL AND A SECOND CONDUCTIVE LAYER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |