US2654675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent screen composition
Assignee: RCA Corp
•
Filing: 1949-12-29
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Granted: 1953-10-06
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Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles W Thierfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A LUMINESCENT VIEWING SCREEN COMPRISING A LIGHT-TRANSMITTING BASE MATERIAL AND A PLURALITY OF LAYERS OF DIFFERENT PHOSPHOR MATERIALS, THE LOWER ONE OF SAID LAYERS ADJACENT SAID BASE COMPRISING SILVER ACTIVATED ZINC SULFIDE AND AN UPPER LAYER SUPERIMPOSED ON SAID LOWER LAYER COMPRIS-
Claim 2
Dependent Claim
42 words
A LUMINESCENT VIEWING SCREEN COMPRISING A LIGHT-TRANSMITTING BASE MATERIAL AND A PLURALITY OF LAYERS OF DIFFERENT PHOSPHOR MATERIALS, THE LOWER ONE OF SAID LAYERS ADJACENT SAID BASE COMPRISING SILVER ACTIVATED ZINC SULFIDE AND AN UPPER LAYER SUPERIMPOSED ON SAID LOWER LAYER COMPRIS-
References Cited (Backward Citations)
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Cited
US2412654A
Cited
US2443728A
Cited
US2415129A
Cited
US2478387A
Cited
US2475330A
Cited
US2446248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |