US3053940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic head
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1957-05-20
•
Granted: 1962-09-11
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Scarbrough Alfred Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/11; G11B5/127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2565191A
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US2660622A
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US2895015A
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US2863002A
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US2747024A
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US2840643A
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US2852618A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |