US2835822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray fluoroscopic screen
Assignee: General Electric Co
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Filing: 1955-09-12
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Granted: 1958-05-20
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Ferd E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
51 words
AN IMAGE INTENSIFYING X-RAY FLUOROSCOPIC SCREEN COMPRISING A LAYER OF X-RAY SENSITIVE LIGHT EMITTING MATERIAL WHICH EMITS VISIBLE LIGHT WIGHIN THE RANGE OF 4000 TO 5000 ANGSTROM UNITS WHEN EXCITED BY INCIDENT X-RAYS, A VISIBLE LIGHT AMPLIFYING CELL CONTIGUOUS WITH SAID X-RAY SENSITIVE MATERIAL, SAID LIGHT AMPLIFYING CELL HAVING A PEAK
References Cited (Backward Citations)
US2743195A
Cited
US2650310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |