US3050657A
Expired / Lapsed
US
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Slow wave structures
Assignee: General Electric Co
•
Filing: 1955-01-12
•
Granted: 1962-08-21
•
Expires: 1975-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Garland M Branch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:55
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26; H01J23/30; H01J23/36; H01J23/40; H01J23/48; H01J23/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2806177A
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US2811673A
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US2814779A
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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) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |