US3271618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depressed collectors for crossed field travelling wave tubes
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1963-10-28
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Granted: 1966-09-06
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Gerald P Kooyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:53
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A ELECTRON DISCHARGE DEVICE COMPRISING AN INTERACTION REGION BOUNDED BY A SLOW WAVE STRUCTURE AND A SOLE ELECTRODE, AN ELECTRON GUN POSITIONED AT ONE END OF SAID INTERACTION REGION FOR INJECTING AN ELECTRON BEAM INTO SAID INTERACTION REGION, AND FIRST AND SECOND COLLECTOR ELECTRODES HAVING MUTUALLY FACING SURFACES POSITIONED AT THE OTHER END OF SAID INTERACTION REGION TO DEFINE A COLLECTOR REGION, THE DISTANCE BETWEEN SAID MUTUALLY FACING SURFACES INCREASING IN THE DIRECTION AWAY FROM SAID INTERACTION REGION OVER AT LEAST A PORTION OF THE LENGTH OF SAID COLLECTOR REGION.
References Cited (Backward Citations)
US2600509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |