US2968798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducing method and system
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1957-09-04
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Granted: 1961-01-17
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Donald L Drukey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:30
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1914; G11; G11B; G11B5/00; G11B5/48; G11B5/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2693908A
Cited
US2528699A
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US2690473A
Cited
US2820688A
Cited
US2755422A
Cited
US2800654A
Cited
US2814030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |