Patent FR567627A successfully refreshed from Google Patents.
Patent US2524839A successfully refreshed from Google Patents.
US2524839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray sensitive screen
Assignee: Individual
•
Filing: 1948-05-27
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Granted: 1950-10-10
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Expires: 1968-05-27
Abstract
No abstract record available.
Inventors
- 👤 James H Schulman
- 👤 Lyle W Evans
- 👤 Ginther Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
G; G21; G21K; G21K4/00; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN APPARATUS FOR PREPARING AN INVISIBLY PERMANENT AND VISIBLY FLUORESCENT IMAGE OF A PATTERN OF RADIATION, THE COMBINATION OF, A PHOSPHOR SCREEN COMPRISING A FINELY DIVIDED SOLID SOLUTION OF A SILVER SALT, SAID SOLUTION BEING RENDERED NONRESPONSIVE TO ULTRA VIOLET RADIATION OF APPROXIMATELY 3650 A. BY LIMITING IT TO LESS THAN ABOUT 4 MOL PERCENT SILVER, A SOURCE OF RADIATION WAVE-LENGTH BETWEEN 0.001 A. AND 500 A., AND A SOURCE OF ULTRA-VIOLET RADIATION APPROXIMATELY 3650 A. IN WAVE-LENGTH.
Claim 2
Dependent Claim
78 words
IN APPARATUS FOR PREPARING AN INVISIBLY PERMANENT AND VISIBLY FLUORESCENT IMAGE OF A PATTERN OF RADIATION, THE COMBINATION OF, A PHOSPHOR SCREEN COMPRISING A FINELY DIVIDED SOLID SOLUTION OF A SILVER SALT, SAID SOLUTION BEING RENDERED NONRESPONSIVE TO ULTRA VIOLET RADIATION OF APPROXIMATELY 3650 A. BY LIMITING IT TO LESS THAN ABOUT 4 MOL PERCENT SILVER, A SOURCE OF RADIATION WAVE-LENGTH BETWEEN 0.001 A. AND 500 A., AND A SOURCE OF ULTRA-VIOLET RADIATION APPROXIMATELY 3650 A. IN WAVE-LENGTH.
References Cited (Backward Citations)
US1418240A
Cited
US1648058A
Cited
US2099602A
Cited
US2074226A
Cited
GB492722A
Cited
US2306626A
Cited
US2360326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |