US2863134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Address selection system for a magnetic drum
Assignee: International Business Machines Corp
•
Filing: 1952-10-25
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Granted: 1958-12-02
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Expires: 1972-10-25
Abstract
No abstract record available.
Inventors
- 👤 Buchholz Werner
- 👤 Cecil A Deutschle
- 👤 David J Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:03
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/08; G06F15/10; G06F9/00; G06K; G06K7/00
Claims Analysis
Total Claims: 0
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US2721990A
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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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |