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Patent US2940670A successfully refreshed from Google Patents.
US2940670A
Expired / Lapsed
US
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Electronic digital computing machines
Assignee: International Business Machines Corp
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Filing: 1956-04-02
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Granted: 1960-06-14
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Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Kilburn Tom
- 👤 Edwards David Beverley George
- 👤 Thomas Gordon Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
G; G06; G06F; G06F5/00; G06F5/01; G06F5/012; G06F7/00; G06F7/38; G06F7/48; G06F7/483
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |