US3231780A
Expired / Lapsed
US
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Meandering slow wave circuit having high impedance stub support means
Assignee: SFD LAB Inc
•
Filing: 1960-10-14
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Granted: 1966-01-25
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Expires: 1980-10-14
Abstract
No abstract record available.
Inventors
- 👤 Feinstein Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:03
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/005; H01J23/16; H01J23/24; H01J25/00; H01J25/34; H01J25/42; H01J25/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2932761A
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US2853644A
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US2960622A
Cited
US2930927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |