US3518651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homing control for flying head of magnetic surface storage system
Assignee: Singer Co
•
Filing: 1969-03-10
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Granted: 1970-06-30
•
Expires: 1989-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ronald B Keeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/40; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2862781A
Cited
US3180943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |