US2810622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage apparatus
Assignee: International Business Machines Corp
•
Filing: 1954-02-08
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Granted: 1957-10-22
•
Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Brown
- 👤 Charles C Zuleeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:18
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/02; G11B5/00; G11B5/74; G11B5/76; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32975; Y10T403/33; Y10T403/49; Y10T403/4949; Y10T403/4958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1468074A
Cited
US1684652A
Cited
US1641059A
Cited
GB294667A
Cited
US1984718A
Cited
US2617705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |