US3391254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head with means for producing a shiftable high permeability region in a magnetic permeable material
Assignee: Individual
•
Filing: 1964-10-15
•
Granted: 1968-07-02
•
Expires: 1984-10-15
Abstract
No abstract record available.
Inventors
- 👤 William M Honig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:33
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/49; G11B5/4907; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2862066A
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US2975241A
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US2984825A
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US3140471A
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US3053941A
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US3084227A
Cited
US3188399A
Cited
US3271571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |