US3257576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuation for crossed-field devices
Assignee: Litton Electron Tube Corp
•
Filing: 1961-12-18
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Granted: 1966-06-21
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Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Paul W Crapuchettes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:04
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A TRAVELLING-WAVE ELECTRON DISCHARGE DEVICE HAVING AN ENERGY ABSORBING MEANS FOR IMPEDANCE MATCHING OF A SLOW-WAVE TRANSMISSION CIRCUIT, SAID SLOW-WAVE CIRCUIT INCLUDING: A PAIR OF PARALLEL CROWN ELEMENTS, AND A PLURALITY OF INTERDIGITAL ELEMENTS AFFIXED TO SAID CROWN ELEMENTS IN ALTERNATE SPACED RELATIONSHIP FORMING THEREBY A ZIG-ZAG PATH FOR PROPAGATING AN ELECTROMAGNETIC WAVE AND FOR INTRODUCING A DELAY IN THE PROPAGATION OF SAID WAVE, SAID ABSORBING MEANS COMPRISING: A LUMPED LOSSY DIELECTRIC MATERIAL DISPOSED AT THE REMOTE END OF THE SLOW-WAVE CIRCUIT, AND A COAXIAL ATTENUATOR INCLUDING A LONG SLENDER METALLIC CONDUCTOR AND AN OUTER METALLIC CONDUCTOR SUBSTANTIALLY SURROUNDING THE INNER CONDUCTOR AND A LOSSY DIELECTRIC MATERIAL DISPOSED BETWEEN THE INNER AND OUTER CONDUCTORS COMPLETELY SURROUNDING SAID INNER CONDUCTOR, SAID
Claim 2
Dependent Claim
121 words
IN A TRAVELLING-WAVE ELECTRON DISCHARGE DEVICE HAVING AN ENERGY ABSORBING MEANS FOR IMPEDANCE MATCHING OF A SLOW-WAVE TRANSMISSION CIRCUIT, SAID SLOW-WAVE CIRCUIT INCLUDING: A PAIR OF PARALLEL CROWN ELEMENTS, AND A PLURALITY OF INTERDIGITAL ELEMENTS AFFIXED TO SAID CROWN ELEMENTS IN ALTERNATE SPACED RELATIONSHIP FORMING THEREBY A ZIG-ZAG PATH FOR PROPAGATING AN ELECTROMAGNETIC WAVE AND FOR INTRODUCING A DELAY IN THE PROPAGATION OF SAID WAVE, SAID ABSORBING MEANS COMPRISING: A LUMPED LOSSY DIELECTRIC MATERIAL DISPOSED AT THE REMOTE END OF THE SLOW-WAVE CIRCUIT, AND A COAXIAL ATTENUATOR INCLUDING A LONG SLENDER METALLIC CONDUCTOR AND AN OUTER METALLIC CONDUCTOR SUBSTANTIALLY SURROUNDING THE INNER CONDUCTOR AND A LOSSY DIELECTRIC MATERIAL DISPOSED BETWEEN THE INNER AND OUTER CONDUCTORS COMPLETELY SURROUNDING SAID INNER CONDUCTOR, SAID
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |