US3471843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible magnetic disc memory
Assignee: Individual
•
Filing: 1965-10-20
•
Granted: 1969-10-07
•
Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Max L Libman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:03
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74; G11B5/82; G11B5/825; G11B17/00; G11B17/02; G11B17/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2092668A
Cited
US2690913A
Cited
US3160466A
Cited
US3231685A
Cited
US3229269A
Cited
US3035840A
Cited
US3315840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |