Patent US2818322A successfully refreshed from Google Patents.
US2818322A
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US
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Assignee: International Business Machines Corp
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Filing: 1953-05-26
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Granted: 1957-12-31
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Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert T Blakely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:54
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/22; G06F7/24; G11; G11B; G11B27/00; G11B27/02; G11B27/031; G11B27/036
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |