US3400386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichannel magnetic head assembly
Assignee: Magnetic Industries Inc
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Filing: 1964-05-27
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Granted: 1968-09-03
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Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 Richard C Sinnott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:32
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; G11B5/295; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/4906; Y10T29/49066
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) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |