US3526726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric transducer assembly for positioning a magnetic record/reproduce head
Assignee: Ampex Corp
•
Filing: 1967-09-27
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Granted: 1970-09-01
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Expires: 1987-09-27
Abstract
No abstract record available.
Inventors
- 👤 James P Corbett
- 👤 Giacomo Vargiu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/56; H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2041; H10N30/2042; H10N30/2043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2751439A
Cited
US3387295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |