US2964594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for magnetically recording high-frequency signals by means of a rotating transducer means
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1957-09-04
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Granted: 1960-12-13
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Security First National Ban An
- 👤 Branch Westwood Village
- 👤 Jack H Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:50
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB657494A
Cited
US2661397A
Cited
US2773120A
Cited
FR1059964A
Cited
US2737646A
Cited
US2722676A
Cited
US2816157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |