US2973508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Comparator
Assignee: International Business Machines Corp
•
Filing: 1958-11-19
•
Granted: 1961-02-28
•
Expires: 1978-11-19
Abstract
No abstract record available.
Inventors
- 👤 Chadurjian Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:38
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/02; G11; G11C; G11C15/00; G11C15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |