Patent US2523306A successfully refreshed from Google Patents.
US2523306A
Expired / Lapsed
US
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Application of radiography to infrared phosphors
Assignee: Individual
•
Filing: 1947-09-23
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Granted: 1950-09-26
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Expires: 1967-09-23
Abstract
No abstract record available.
Inventors
- 👤 Herman F Kaiser
- 👤 Otto E Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:09
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; G03C5/164; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
IN A SYSTEM FOR PRODUCING A RADIOGRAPHIC IMAGE IN ACCORDANCE WITH THE VARYING OPACITY OF AN OPAQUE OBJECT; THE COMBINATION OF, AN INFRA-RED SENSITIVE PHOSPHOR SCREEN, MEANS INCLUDING A SOURCE OF RADIANT ENERGY HAVING A WAVE LENGTH OF LESS THAN 1.2 X 10**-6 CM. FOR PROJECTING A SHADOWGRAPH IN ACCORDANCE WITH THE VARYING OPACITY OF SAID OPAQUE OBJECT INVISIBLE TO THE EYE ONTO SAID PHOSPHOR SCREEN, AND MEANS INCLUDING A SOURCE OF INFRA-RED RADIATION FOR THEREAFTER ILLUMINATING SAID SCREEN WHEREBY SAID SHADOWGRAPH IS RENDERED VISIBLE TO THE EYE.
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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) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |