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US2644893A
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Semiconductor pulse memory circuits
Assignee: RCA Corp
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Filing: 1952-06-02
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Granted: 1953-07-07
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Expires: 1972-06-02
Abstract
No abstract record available.
Inventors
- 👤 John B Gehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:47
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2569345A
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US2627039A
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US2623170A
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US2620448A
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US2591961A
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US2594449A
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US2622211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |