Patent US1972141A successfully refreshed from Google Patents.
US2997669A
Expired / Lapsed
US
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Broad band lobing switch
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1958-02-03
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Granted: 1961-08-22
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Randolph E Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/12; H01P1/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1926857A
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US2426186A
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US2498907A
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US2576943A
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US2748208A
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US2879483A
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US2784379A
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US2846653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |