US3423743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random access magnetic tape memory system
Assignee: Individual
•
Filing: 1964-11-27
•
Granted: 1969-01-21
•
Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:02
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B27/00; G11B27/10; G11B27/102; G11B27/107; G11B27/19; G11B27/24; G11B27/26; G11B27/28; G11B5/53; G11B5/531; G11B5/54; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3179001A
Cited
US3246307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |