Patent US3416149A successfully refreshed from Google Patents.
US3416149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid lubricated magnetic tape transducer
Assignee: Ampex Corp
•
Filing: 1965-03-26
•
Granted: 1968-12-10
•
Expires: 1985-03-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred F Stahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:55
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/488; G11B5/4893; G11B15/00; G11B15/60; G11B15/62; G11B15/64
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |