Patent US3110889A successfully refreshed from Google Patents.
US3110889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic disc storage device
Assignee: Laboratory For Electronics Inc
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Filing: 1960-05-02
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Granted: 1963-11-12
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Richard E Morley
- 👤 Claude J Mazzola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:01
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/0284; G11B17/021; G11B17/32; G11B23/00; G11B23/02; G11B23/021; G11B25/00; G11B25/04; G11B25/043; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B5/74; G11B5/82; G11B5/825
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
DATA STORAGE APPARATUS COMPRISING A FLEXIBLE DISC HAVING A MAGNETIZABLE SURFACE, A BACK PLATE HAVING A COEXTENSIVE PLANAR SURFACE FACING THE DISC''S MAGNETIZABLE SURFACE, THE DISC HAVING A PLURALITY OF SMALL PERFORATIONS SPACED SYMMETRICALLY ADJACENT THE DISC''S PERIPHERY, MEANS FOR ROTATING THE DISC TO ESTABLISH A RELATIVELY SMALL CONTINUOUS SEPARATION BETWEEN THE DISC''S MAGNETIZABLE SURFACE AND THE PLATE''S PLANAR SURFACE, A PLURALITY OF TRANSDUCER HEADS SET INTO THE BACK PLATE, EACH OF THE TRANSDUCER HEADS PRESENTING A SURFACE FLUSH WITH THE PLATE''S PLANAR SURFACE, THE TRANSDUCER HEADS BEING SPACED IN CLOSE PROXIMITY BUT AT DIFFERENT RADIAL DISTANCES FROM THE DISC''S AXIS
Claim 2
Dependent Claim
101 words
DATA STORAGE APPARATUS COMPRISING A FLEXIBLE DISC HAVING A MAGNETIZABLE SURFACE, A BACK PLATE HAVING A COEXTENSIVE PLANAR SURFACE FACING THE DISC''S MAGNETIZABLE SURFACE, THE DISC HAVING A PLURALITY OF SMALL PERFORATIONS SPACED SYMMETRICALLY ADJACENT THE DISC''S PERIPHERY, MEANS FOR ROTATING THE DISC TO ESTABLISH A RELATIVELY SMALL CONTINUOUS SEPARATION BETWEEN THE DISC''S MAGNETIZABLE SURFACE AND THE PLATE''S PLANAR SURFACE, A PLURALITY OF TRANSDUCER HEADS SET INTO THE BACK PLATE, EACH OF THE TRANSDUCER HEADS PRESENTING A SURFACE FLUSH WITH THE PLATE''S PLANAR SURFACE, THE TRANSDUCER HEADS BEING SPACED IN CLOSE PROXIMITY BUT AT DIFFERENT RADIAL DISTANCES FROM THE DISC''S AXIS
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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |