US2835743A
Expired / Lapsed
US
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Magnetic transducer assembly
Assignee: International Business Machines Corp
•
Filing: 1956-03-22
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Granted: 1958-05-20
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Expires: 1976-03-22
Abstract
No abstract record available.
Inventors
- 👤 Robert V Muffley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; G11B5/29; G11B5/48; G11B5/488; G11B5/4886; G11B5/49; G11B5/4969; G11B5/54; G11B5/55; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/4906
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |