US3373413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pliable magnetic recording disk with direct transducer contact
Assignee: International Business Machines Corp
•
Filing: 1963-10-30
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Granted: 1968-03-12
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Robert C Treseder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:54
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/32; G11B5/00; G11B5/62; G11B5/64; G11B5/65; G11B5/658; G11B5/74; G11B5/82; G11B5/825; H; H01; H01F; H01F10/00; H01F10/26; H01F10/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49867
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2535480A
Cited
US3036304A
Cited
US3130110A
Cited
US3212075A
Cited
US3290692A
Cited
US3336583A
Cited
US3334193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |