US2842755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ternary magnetic storage device
Assignee: International Business Machines Corp
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Filing: 1955-08-25
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Granted: 1958-07-08
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Expires: 1975-08-25
Abstract
No abstract record available.
Inventors
- 👤 Richard C Lamy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:21
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/82; G; G11; G11C; G11C11/00; G11C11/02; G11C11/08; H01; H01F; H01F3/00; H01F3/08; H03K3/00; H03K3/02; H03K3/45; H03K3/51
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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |