US3676216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration processing of magnetic tape
Assignee: Audio Magnetics Corp
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Filing: 1969-01-21
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Granted: 1972-07-11
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Expires: 1989-01-21
Abstract
Abstract ULTRASONIC PROCESSING OF THE MAGNETIZABLE MATERIAL COATING ON MAGNETIC TAPE MEANS RENDERS THE COATING THICKNESS MORE NEARLY UNIFORM AND THUS IMPROVES TAPE QUALITY AND FIDELITY OF REPRODUCTION. IMPROVED TAPE HANDLING TECHNIQUES FOR SUCH PROCESSING ARE PROVIDED INCLUDING GAS BEARING BIASING OF THE TAPE TOWARD THE PROCESSING HEAD.
Inventors
- 👤 Georges D Abitboul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:18
CPC Classifications
G; G03; G03G; G03G19/00; G11; G11B; G11B5/00; G11B5/84; G11B5/8412; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266
Claims Analysis
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |