US3064242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic record sensing apparatus
Assignee: Unisys Corp
•
Filing: 1957-04-11
•
Granted: 1962-11-13
•
Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 John L Hill
- 👤 Jr John A Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:51
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/20; G11B20/10; G11B20/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2764463A
Cited
US2817829A
Cited
US2698427A
Cited
US2793344A
Cited
US2835882A
Cited
US2862199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |