US3381965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track changing mechanism for magnetic tape recorders
Assignee: Bell and Howell Co
•
Filing: 1965-10-23
•
Granted: 1968-05-07
•
Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Lewis B Browder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:00
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5504; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/295; G11B15/44; G11B15/444
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2668059A
Cited
US3069510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |