US2989731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage unit
Assignee: International Business Machines Corp
•
Filing: 1955-03-08
•
Granted: 1961-06-20
•
Expires: 1975-03-08
Abstract
No abstract record available.
Inventors
- 👤 Nicholas J Albanes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
—
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2484226A
Cited
US2540654A
Cited
US2587532A
Cited
US2611813A
Cited
US2609498A
Cited
US2614169A
Cited
GB732221A
Cited
US2739301A
Cited
US2714843A
Cited
US2718356A
Cited
US2745006A
Cited
US2679638A
Cited
US2913706A
Cited
US2819457A
Cited
US2813259A
Cited
US2817072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |