US3153241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recorder
Assignee: Laboratory For Electronics Inc
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Filing: 1961-08-31
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Granted: 1964-10-13
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Expires: 1981-08-31
Abstract
No abstract record available.
Inventors
- 👤 Frank A Ramrath
- 👤 Joseph V Comiskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/488; G11B5/4886; G11B17/00; G11B17/32; G11B5/54; G11B5/55; G11B5/5521; G11B5/58; G11B5/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A MAGNETIC RECORDER IN WHICH A FLEXIBLE DISC HAVING A MAGNETIZABLE SURFACE IS USED AS A MAGNETIC STORAGE MEDIUM COMPRISING: (A) A STABILIZING PLATE, SPACED FROM THE FLEXIBLE DISC, HAVING A SUBSTANTIALLY FLAT SURFACE; (B) MEANS FOR ROTATING THE FLEXIBLE DISC ADJACENT TO THE SUBSTANTIALLY FLAT SURFACE OF THE STABILIZING PLATE TO CAUSE THE MAGNETIZABLE SURFACE OF THE FLEXIBLE DISC TO ASSUME THE SHAPE OF A SURFACE OF REVOLUTION; (C) A MAGNETIC TRANSDUCER DISPOSED ADJACENT THE FLEXIBLE DISC ON THE SIDE THEREOF OPPOSITE THE STABILIZING PLATE; AND, (D) MEANS OPERATIVE THROUGH THE MAGNETIC TRANSDUCER TO DEFORM THE FLEXIBLE DISC LOCALLY ADJACENT SUCH TRANSDUCER AND ADJUST THE SPACING BETWEEN THE GAP THEREOF AND THE MAGNETIZABLE SURFACE OF THE FLEXIBLE DISC.
Claim 2
Dependent Claim
119 words
A MAGNETIC RECORDER IN WHICH A FLEXIBLE DISC HAVING A MAGNETIZABLE SURFACE IS USED AS A MAGNETIC STORAGE MEDIUM COMPRISING: (A) A STABILIZING PLATE, SPACED FROM THE FLEXIBLE DISC, HAVING A SUBSTANTIALLY FLAT SURFACE; (B) MEANS FOR ROTATING THE FLEXIBLE DISC ADJACENT TO THE SUBSTANTIALLY FLAT SURFACE OF THE STABILIZING PLATE TO CAUSE THE MAGNETIZABLE SURFACE OF THE FLEXIBLE DISC TO ASSUME THE SHAPE OF A SURFACE OF REVOLUTION; (C) A MAGNETIC TRANSDUCER DISPOSED ADJACENT THE FLEXIBLE DISC ON THE SIDE THEREOF OPPOSITE THE STABILIZING PLATE; AND, (D) MEANS OPERATIVE THROUGH THE MAGNETIC TRANSDUCER TO DEFORM THE FLEXIBLE DISC LOCALLY ADJACENT SUCH TRANSDUCER AND ADJUST THE SPACING BETWEEN THE GAP THEREOF AND THE MAGNETIZABLE SURFACE OF THE FLEXIBLE DISC.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |