US2950353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pliant disk magnetic recording apparatus
Assignee: Northrop Grumman Systems Corp
•
Filing: 1955-07-05
•
Granted: 1960-08-23
•
Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 S M Fomenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/32; G11B5/00; G11B5/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE586532C
Cited
US2038216A
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GB509458A
Cited
US2603539A
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US2750579A
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US2737646A
Cited
US2772135A
Cited
US2899260A
Cited
US2787513A
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FR1119186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |