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Patent US3383667A successfully refreshed from Google Patents.
US3383667A
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Magnetic head spacing apparatus
Assignee: Unisys Corp
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Filing: 1965-01-04
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Granted: 1968-05-14
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Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 William H Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:24
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; Y10T29/49027; Y10T29/4903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2700588A
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US2813932A
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US2769036A
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US2785232A
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US2866011A
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US2998292A
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US2962558A
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US3047674A
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US3207856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |