US2451590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming a luminescent screen
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1945-07-06
•
Granted: 1948-10-19
•
Expires: 1965-07-06
Abstract
No abstract record available.
Inventors
- 👤 Tidik Stephen
- 👤 Steadman Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:03
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/22; C09K; C09K11/00; C09K11/02; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2108683A
Cited
US2219899A
Cited
GB494105A
Cited
US2252552A
Cited
US2328292A
Cited
US2412654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |