Patent US2957626A successfully refreshed from Google Patents.
US2957626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed electronic calculator
Assignee: International Business Machines Corp
•
Filing: 1955-11-21
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Granted: 1960-10-25
•
Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Byron L Havens
- 👤 Kenneth E Schreiner
- 👤 Lowell D Amdahl
- 👤 John P Cedarholm
- 👤 Jeenel Joachim
- 👤 Harley R Meadows
- 👤 George E Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:39
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754; G06F11/076; G06F11/08; G06F15/00; G06F15/76; G06F15/78
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |