UST915016I4
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: 1973-04-26
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Granted: 1973-10-30
•
Expires: 1993-04-26
Abstract
Abstract A MAGNETIC HEAD SURFACE CONTOUR IS DEFINED BY TWO CONSTANT RADII. THE TWO PAIRS OF POINTS AT WHICH A MAGNETIC TAPE IS TANGENT TO THE TWO CONTOURS LOCATE TWO CENTER-OF-WRAP AT THE MIDPOINTS OF TANGENCY. THE TAPE PATH IS CONTROLLED TO GIVE TWO DIFFERENT TAPE WRAP ANGLES RELATIVE TO THE HORIZONTAL. A READ GAP, USED DURING BOTH FORWARD AND BACKWARD TAPE MOTION IS LOCATED AT BUT NOT PRECISELY ON, ONE OF THE CENTERS-OF-WRAP. A WRITE GAP, USED DURING WRITE OPERATIONS, IS LOCATED DOWNSTREAM (DUR ING FORWARD TAPE MOTION) FROM THE OTHER CENTER-OF-WRAP.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |