US2473960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicate-titanate phosphors
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-01-14
•
Granted: 1949-06-21
•
Expires: 1966-01-14
Abstract
No abstract record available.
Inventors
- 👤 Kroger Ferdinand Anne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:14
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/67; C09K11/676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2244558A
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US2171145A
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US2269819A
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US2379057A
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US2257667A
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US2298947A
Cited
US2415129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |