US2923472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arithmetic unit using magnetic core counters
Assignee: International Business Machines Corp
•
Filing: 1953-11-25
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Granted: 1960-02-02
•
Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Whitney Gordon Earle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:22
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/04; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/498; G06F7/4983; G06F7/4985; H; H03; H03K; H03K23/00; H03K23/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2176932A
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US2192612A
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US2409689A
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US2575331A
Cited
US2641407A
Cited
US2591406A
Cited
US2652501A
Cited
US2697178A
Cited
US2733861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |