US2615128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic tube
Assignee: Individual
•
Filing: 1949-10-21
•
Granted: 1952-10-21
•
Expires: 1969-10-21
Abstract
No abstract record available.
Inventors
- 👤 Ruderfer Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:14
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/26; H01J49/28; H01J49/30; G; G11; G11C; G11C11/00; G11C11/21; G11C11/23; G21; G21K; G21K1/00; G21K1/08; G21K1/093; H01J31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454094A
Cited
US2489082A
Cited
US2457980A
Cited
US2553312A
Cited
US2473477A
Cited
US2559769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |