US3445832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape control system for multiple tape,uninterrupted recording and reproducing
Assignee: 3M Co
•
Filing: 1965-04-29
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Granted: 1969-05-20
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Paul D Leeke
- 👤 David A Bixler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:47
CPC Classifications
G; G11; G11B; G11B31/00; B; B64; B64G; B64G1/00; B64G1/22; G11B27/00; G11B27/10; H; H02; H02P; H02P5/00; H02P5/46; H02P5/52; H02P5/56
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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |