US2795840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory tube
Assignee: International Business Machines Corp
•
Filing: 1953-02-18
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Granted: 1957-06-18
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Expires: 1973-02-18
Abstract
No abstract record available.
Inventors
- 👤 Salecker Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:08
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/23; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/41; H01J31/00; H01J31/08; H01J31/58; H01J31/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2527127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |