Patent US2494883A successfully refreshed from Google Patents.
US2494883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cascaded fluorescent material
Assignee: General Electric Co
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Filing: 1946-10-23
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Granted: 1950-01-17
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Expires: 1966-10-23
Abstract
No abstract record available.
Inventors
- 👤 Kroger Ferdinand Anne
- 👤 Voogd Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:27
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
IN A GENERATOR OF RED LIGHT THE COMBINATION OF TWO LAYERS OF FLUORESCENT MATERIALS ONE LAYER OF WHICH COMPRISES CADMINUM BORATE ACTIVATED WITH MANGANESE EXCITED BY RADIATION HAVING A WAVELENGTH LESS THAN 3250 ANGSTROM UNITS AND
Claim 2
Dependent Claim
36 words
IN A GENERATOR OF RED LIGHT THE COMBINATION OF TWO LAYERS OF FLUORESCENT MATERIALS ONE LAYER OF WHICH COMPRISES CADMINUM BORATE ACTIVATED WITH MANGANESE EXCITED BY RADIATION HAVING A WAVELENGTH LESS THAN 3250 ANGSTROM UNITS AND
References Cited (Backward Citations)
US2096986A
Cited
GB474907A
Cited
US2244558A
Cited
US2243828A
Cited
US2181305A
Cited
US2357732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |