Patent US2802753A successfully refreshed from Google Patents.
US2802753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tri-color kinescope screen
Assignee: RCA Corp
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Filing: 1953-10-15
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Granted: 1957-08-13
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Expires: 1973-10-15
Abstract
No abstract record available.
Inventors
- 👤 Gilmore E Crosby
- 👤 John A Markoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:09
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A TRI-COLOR KINESCOPE VIEWING SCREEN COMPRISING A BASE PLATE HAVAING DISPOSED THEREON LUMINESCENT SUBSTANCES COMPRISING A RED-EMITTING PHOSPHOR SELECTED FROM THE CLASS CONSISTING OF ZINC SELENIDE AND ZINC CADMIUM SELENIDE IN WHICH THE RATIO OF ZINC TO CADMIUM IS AT LEAST 8:1 BY WEIGHT AND CONTAINING .003 TO .03% BY WEIGHT COPPER ACTIVATOR, A BLUE-EMITTING PHOSPHOR HAVING A PEAK EMISSION WAVE-LENGTH OF LESS THAN ABOUT 470M$ AND A COLOR SATURATION VALUE ABOUT THE SAME AS THAT OF STANDARD "WILLEMITE," AND GREEN-EMITTING PHOSPHOR COMPRISING ZINC ORTHOSILICATE CONTAINING ABOUT 2 TO 3% BY WEIGHT MANGANESE ACTIVATOR.
Claim 2
Dependent Claim
94 words
A TRI-COLOR KINESCOPE VIEWING SCREEN COMPRISING A BASE PLATE HAVAING DISPOSED THEREON LUMINESCENT SUBSTANCES COMPRISING A RED-EMITTING PHOSPHOR SELECTED FROM THE CLASS CONSISTING OF ZINC SELENIDE AND ZINC CADMIUM SELENIDE IN WHICH THE RATIO OF ZINC TO CADMIUM IS AT LEAST 8:1 BY WEIGHT AND CONTAINING .003 TO .03% BY WEIGHT COPPER ACTIVATOR, A BLUE-EMITTING PHOSPHOR HAVING A PEAK EMISSION WAVE-LENGTH OF LESS THAN ABOUT 470M$ AND A COLOR SATURATION VALUE ABOUT THE SAME AS THAT OF STANDARD "WILLEMITE," AND GREEN-EMITTING PHOSPHOR COMPRISING ZINC ORTHOSILICATE CONTAINING ABOUT 2 TO 3% BY WEIGHT MANGANESE ACTIVATOR.
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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |