Patent US3049790A successfully refreshed from Google Patents.
US3049790A
Expired / Lapsed
US
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Magnetic head and method of making same
Assignee: IIT Research Institute
•
Filing: 1954-06-03
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Granted: 1962-08-21
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Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Camras Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:21
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49071; Y10T29/49787; Y10T29/49789; Y10T29/49798
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1131037A
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US1243004A
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US2334584A
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US2456767A
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US2612681A
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US2613430A
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US2706752A
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US2763729A
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US2754569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |