Patent US2454499A successfully refreshed from Google Patents.
US2454499A
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US
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X-ray screen
Assignee: United States Radium Corp
•
Filing: 1944-11-21
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Granted: 1948-11-23
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Expires: 1964-11-21
Abstract
No abstract record available.
Inventors
- 👤 William H Byler
- 👤 Clayton C Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:35
CPC Classifications
G; G21; G21K; G21K4/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1622379A
Cited
GB424195A
Cited
US2099023A
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US2126233A
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DE640056C
Cited
GB406957A
Cited
US2075399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |