US3440555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped-loss attenuator for equalizing the gain of a traveling wave tube amplifier
Assignee: United States Department of the Navy
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Filing: 1966-03-21
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Granted: 1969-04-22
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Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Wolkstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:03
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J23/00; H01J23/16; H01J23/24; H01J23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |