US3414683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable fluid rotary bearings for use in a synchronous transformer rotary head recorder
Assignee: Ampex Corp
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Filing: 1964-04-02
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Granted: 1968-12-03
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Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Dale P Dolby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:39
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0696; F16C13/00; F16C23/00; G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53; H; H01; H01F; H01F38/00; H01F38/18; H02; H02K; H02K5/00; H02K5/04; H02K5/16; Y; Y10; Y10T; Y10T74/00; Y10T74/17; Y10T74/173
Claims Analysis
Total Claims: 0
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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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |