US2957626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed electronic calculator
Assignee: International Business Machines Corp
•
Filing: 1955-11-21
•
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 16:53
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2538636A
Cited
US2658681A
Cited
US2604262A
Cited
US2636672A
Cited
US2701095A
Cited
US2634052A
Cited
GB734073A
Cited
US2800277A
Cited
GB742525A
Cited
US2757864A
Cited
US2689950A
Cited
US2769592A
Cited
FR1084147A
Cited
GB749836A
Cited
US2674727A
Cited
US2719959A
Cited
BE526058A
Cited
FR1099467A
Cited
FR1106950A
Cited
US2925218A
Cited
US2916210A
Cited
US2913176A
Cited
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 |