Patent US2931025A successfully refreshed from Google Patents.
US2931025A
Expired / Lapsed
US
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Data handling circuit
Assignee: International Business Machines Corp
•
Filing: 1957-12-30
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Granted: 1960-03-29
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph C Wolcott
- 👤 Harry R Lord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:42
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/124; H03M1/129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2454781A
Cited
US2829248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |