US3145386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information storage device
Assignee: Unisys Corp
•
Filing: 1962-02-16
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Granted: 1964-08-18
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Expires: 1982-02-16
Abstract
No abstract record available.
Inventors
- 👤 Walter G Wadey
- 👤 Tickell Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:56
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74; G11B5/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A MAGNETIC STORAGE DEVICE COMPRISING A PLURALITY OF SUBSTANTIALLY CYLINDRICAL HOLLOW BODIES OF DIFFERENT DIAMETER, SAID BODIES BEING ARRANGED IN CONCENTRIC SPACED RELATIONSHIP, SAID BODIES BEING ADAPTED TO RECEIVE MAGNETIC INFORMATION THEREON.
Claim 2
Dependent Claim
32 words
A MAGNETIC STORAGE DEVICE COMPRISING A PLURALITY OF SUBSTANTIALLY CYLINDRICAL HOLLOW BODIES OF DIFFERENT DIAMETER, SAID BODIES BEING ARRANGED IN CONCENTRIC SPACED RELATIONSHIP, SAID BODIES BEING ADAPTED TO RECEIVE MAGNETIC INFORMATION THEREON.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |