Patent US2939452A successfully refreshed from Google Patents.
Patent US3268761A successfully refreshed from Google Patents.
US3268761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling-wave tube slow-wave structure including multiple helices interconnected byspaced conductive plates
Assignee: Raytheon Co
•
Filing: 1963-04-03
•
Granted: 1966-08-23
•
Expires: 1983-04-03
Abstract
No abstract record available.
Inventors
- 👤 Michael M Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:48
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/16; H01J23/24; H01J23/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A SLOW-WAVE STRUCTURE FOR A TRAVELING-WAVE TUBE COMPRISING: A MULTIFILAR HELIX INCLUDING A PLURALITY OF EQUALLY SPACED INDIVIDUAL HELICAL CONDUCTORS HAVING THE SAME HELICAL DIAMETER AND PITCH DISPOSED ABOUT A COMMON AXIS, A PLURALITY OF ELECTRICALLY CONDUCTIVE ELEMENTS SPACED ALONG SAID MULTIFILAR HELIX IN PLANES PERPENDICULAR TO SAID AXIS, EACH OF SAID ELEMENTS DEFINING AN APERTURE ENCOMPASSING SAID AXIS AND ALIGNED WITH THE REPECTIVE APERTURES IN THE OTHER ONES OF SAID ELEMENTS, EACH OF SAID ELEMENTS BEING ELECTRICALLY CONNECTED TO EACH OF SAID HELICAL CONDUCTORS AT AT LEAST A POINT, AND ECH OF SAID POINTS FOR EACH OF SAID ELEMENTS BEING ANGULARLY DISPLACED BY AN ANGLE OTHER THAN 180* WITH RESPECT OF SAID POINTS FOR THE NEXT SUCCESSIVE ONE OF SAID ELEMENTS ALONG SAID AXIS.
Claim 2
Dependent Claim
125 words
A SLOW-WAVE STRUCTURE FOR A TRAVELING-WAVE TUBE COMPRISING: A MULTIFILAR HELIX INCLUDING A PLURALITY OF EQUALLY SPACED INDIVIDUAL HELICAL CONDUCTORS HAVING THE SAME HELICAL DIAMETER AND PITCH DISPOSED ABOUT A COMMON AXIS, A PLURALITY OF ELECTRICALLY CONDUCTIVE ELEMENTS SPACED ALONG SAID MULTIFILAR HELIX IN PLANES PERPENDICULAR TO SAID AXIS, EACH OF SAID ELEMENTS DEFINING AN APERTURE ENCOMPASSING SAID AXIS AND ALIGNED WITH THE REPECTIVE APERTURES IN THE OTHER ONES OF SAID ELEMENTS, EACH OF SAID ELEMENTS BEING ELECTRICALLY CONNECTED TO EACH OF SAID HELICAL CONDUCTORS AT AT LEAST A POINT, AND ECH OF SAID POINTS FOR EACH OF SAID ELEMENTS BEING ANGULARLY DISPLACED BY AN ANGLE OTHER THAN 180* WITH RESPECT OF SAID POINTS FOR THE NEXT SUCCESSIVE ONE OF SAID ELEMENTS ALONG SAID AXIS.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |