US2901168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital data system
Assignee: International Business Machines Corp
•
Filing: 1954-03-05
•
Granted: 1959-08-25
•
Expires: 1974-03-05
Abstract
No abstract record available.
Inventors
- 👤 Warren P Burrell
- 👤 Arnold A Cohen
- 👤 George A Hardenbergh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2609143A
Cited
US2701095A
Cited
US2792987A
Cited
US2749037A
Cited
GB692912A
Cited
US2770797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |