Patent US2933720A successfully refreshed from Google Patents.
US2933720A
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Magnetic memory systems
Assignee: RCA Corp
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Filing: 1956-12-31
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Granted: 1960-04-19
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Newhouse
- 👤 William L Mcmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:39
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/02; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/06021; G11C11/06028; G11C11/06035; G11C11/0605; G11C19/00; G11C19/02; G11C19/04; G21; G21C; G21C17/00; G21C17/02; G21C17/04; G21C17/044; G21C17/047; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |