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Patent US2984823A successfully refreshed from Google Patents.
US2984823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage devices
Assignee: International Computers and Tabulators Ltd
•
Filing: 1956-03-06
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Granted: 1961-05-16
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Spencer Arthur James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
H; H03; H03M; H03M9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2734184A
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US2784390A
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US2702380A
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US2931014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |