Patent US3415684A successfully refreshed from Google Patents.
US3415684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preconditioning digital magnetic tape
Assignee: International Business Machines Corp
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Filing: 1966-01-07
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Granted: 1968-12-10
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Expires: 1986-01-07
Abstract
No abstract record available.
Inventors
- 👤 Hayunga Carl Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:24
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD OF PRECONDITIONING MAGNETIC TAPE PRIOR TO USE ON A DIGITAL TAPE DRIVE, INCLUDING THE STEPS OF: HEATING A ROLL OF SAID TAPE TO A TEMPERATURE WITHIN THE RANGE OF 90* TO 120*F. UNTIL A UNIFORM TEMPERATURE IS ESTABLISHED WITHIN THE ROLL, COOLING THE ROLL TO ROOM TEMPERATURE, AND SCRAPING EACH SURFACE OF SAID TAPE.
Claim 2
Independent Claim
56 words
A METHOD OF PRECONDITIONING MAGNETIC TAPE PRIOR TO USE ON A DIGITAL TAPE DRIVE, INCLUDING THE STEPS OF: HEATING A ROLL OF SAID TAPE TO A TEMPERATURE WITHIN THE RANGE OF 90* TO 120*F. UNTIL A UNIFORM TEMPERATURE IS ESTABLISHED WITHIN THE ROLL, COOLING THE ROLL TO ROOM TEMPERATURE, AND SCRAPING EACH SURFACE OF SAID TAPE.
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |