US3664610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic system for lifting magnetic tape from magnetic heads
Assignee: ExxonMobil Upstream Research Co
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Filing: 1970-07-06
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Granted: 1972-05-23
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Expires: 1990-07-06
Abstract
Abstract MAGNETIC TAPE TRANSPORT APPARATUS FOR USE WITH DIGITAL COMPUTERS AND RECORDERS USE TAPE TENSION CONTROL DEVICES IN CONJUCTION WITH THE SPEED CONTROL MECHANISM CONTROLLING SPEED AND DDIRECTION OF THE TAPE TRANSFER BETWEEN A STORAGE REEL AND A "TAKE-UP" REEL. THE WEAR RATE OF THE MAGNETIC HEAD USED FOR RECORDING AND/OR REPRODUCING DATA SIGNALS IS MINIMIZED BY DIRECTING A STREAM OF COMPRESSED AIR BETWEEN THE HEAD AND THE TAPE.
Inventors
- 👤 John H Sasseen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:17
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/56; G11B15/58; G11B15/60
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |