Patent US3144640A successfully refreshed from Google Patents.
US3144640A
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Ferrite matrix storage
Assignee: International Standard Electric Corp
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Filing: 1959-08-03
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Granted: 1964-08-11
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Expires: 1979-08-03
Abstract
No abstract record available.
Inventors
- 👤 Grooteboer Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:39
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/06021; G11C11/06028; G11C11/06035; G11C11/06042; H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04L; H04L13/00; H04L13/02; H04L13/08; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2902677A
Cited
US2900624A
Cited
US2897482A
Cited
US2908893A
Cited
US2920315A
Cited
US2911631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |