US2929671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer drum construction
Assignee: Ferranti International PLC
•
Filing: 1956-01-19
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Granted: 1960-03-22
•
Expires: 1976-01-19
Abstract
No abstract record available.
Inventors
- 👤 Maurice K Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:01
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0696; G; G11; G11B; G11B5/00; G11B5/004; G11B5/74; G11B5/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194645A
Cited
US2259715A
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US2435343A
Cited
US2631905A
Cited
US2603539A
Cited
US2820688A
Cited
US2670146A
Cited
GB726018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |