US3387169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow wave structure of the comb type having strap means connecting the teeth to form iterative inductive shunt loadings
Assignee: SFD LAB Inc
•
Filing: 1965-05-07
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Granted: 1968-06-04
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Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 George K Farney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:18
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/40; H01J23/00; H01J23/02; H01J23/04; H01J23/05; H01J23/16; H01J23/24; H01J25/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2567748A
Cited
US2945981A
Cited
US3243735A
Cited
US3227914A
Cited
US3198979A
Cited
US3254262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |