US2746933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoride phosphors
Assignee: RCA Corp
•
Filing: 1953-04-28
•
Granted: 1956-05-22
•
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
2026-10-27 21:15
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/64; C09K11/644; C09K11/645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A LUMINESCENT MATERIAL HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A LUMINESCENT MATERIAL HAVING THE FORMULA
References Cited (Backward Citations)
GB579749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |