US2806002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoride phosphors
Assignee: RCA Corp
•
Filing: 1953-04-28
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Granted: 1957-09-10
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Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur L J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:30
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/61; C09K11/615; C09K11/616
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
A LUMINESCENT MATERIAL COMPRISING A MANGANESE ACTIVATED FLUORIDE IN WHICH THE FLUORIDE MATRIX THEREOF HAS THE MOLAR FORMULA:
References Cited (Backward Citations)
US2435435A
Cited
GB579749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |