US3478246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric bimorph driven tuners for electron discharge devices
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1967-05-05
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Granted: 1969-11-11
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Expires: 1987-05-05
Abstract
No abstract record available.
Inventors
- 👤 William H Perkins
- 👤 Robert E Klotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:40
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/20; H01J23/207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2463472A
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US2752495A
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US3048797A
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US3087124A
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US3034014A
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US3317785A
Cited
US3334267A
Cited
US3333148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |