US3001850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End-driven resilient recording device
Assignee: International Business Machines Corp
•
Filing: 1959-02-27
•
Granted: 1961-09-26
•
Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Marrs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:42
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2627443A
Cited
US2787750A
Cited
US2687595A
Cited
US2899260A
Cited
US2864552A
Cited
US2889474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |