Patent US3425004A successfully refreshed from Google Patents.
US3425004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency energy attenuator
Assignee: McDonnell Douglas Corp
•
Filing: 1963-11-29
•
Granted: 1969-01-28
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Henry B Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:06
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/18; F42B3/188; H; H03; H03H; H03H2/00; H03H2/005; H03H2/008; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/1018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A DEVICE OF THE CLASS DESCRIBED, A TRANSMISSION LINE COMPRISING: A PAIR OF REGULAR CONDUCTING LEADS FOR TRANSMITTING ELECTRICAL ENERGY TO A LOAD, SAID LEADS BEING POSITIONED AT LEAST PARALLEL TO EACH OTHER AND FABRICATED OF AN AT LEAST FAIRLY GOOD ELECTRICALLY CONDUCTING, HIGH PERMEABILITY MAGNETIC MATERIAL THAT PROVIDES PRIMARILY LARGE SKIN EFFECT LOSSES A HIGHER FREQUENCIES, AND EACH OF SAID LEADS INCLUDING A SHAPED CROSS SECTION HAVING AT LEAST A FLAT SIDE WHEREIN SUCH CORRESPONDING FLAT SIDES OF SAID LEADS ARE POSITIONED CLOSELY ADJACENT AND PARALLEL TO EACH OTHER WHEREBY PROXIMITY EFFECTS ARE GREATLY ENHANCED; DIELECTRIC MATERIAL COMPLETELY SURROUNDING SAID SHAPED CROSS SECTION OF EACH OF SAID LEADS AND MAINTAINING SAID LEADS IN POSITION RELATIVE TO EACH OTHER; AND A SHEATH ENCLOSING SAID DIELECTRIC MATERIAL AND POSITIONED GENERALLY PARALLEL TO AND SPACED FROM THE OUTER SURFACES OF SAID LEADS.
Claim 2
Dependent Claim
141 words
IN A DEVICE OF THE CLASS DESCRIBED, A TRANSMISSION LINE COMPRISING: A PAIR OF REGULAR CONDUCTING LEADS FOR TRANSMITTING ELECTRICAL ENERGY TO A LOAD, SAID LEADS BEING POSITIONED AT LEAST PARALLEL TO EACH OTHER AND FABRICATED OF AN AT LEAST FAIRLY GOOD ELECTRICALLY CONDUCTING, HIGH PERMEABILITY MAGNETIC MATERIAL THAT PROVIDES PRIMARILY LARGE SKIN EFFECT LOSSES A HIGHER FREQUENCIES, AND EACH OF SAID LEADS INCLUDING A SHAPED CROSS SECTION HAVING AT LEAST A FLAT SIDE WHEREIN SUCH CORRESPONDING FLAT SIDES OF SAID LEADS ARE POSITIONED CLOSELY ADJACENT AND PARALLEL TO EACH OTHER WHEREBY PROXIMITY EFFECTS ARE GREATLY ENHANCED; DIELECTRIC MATERIAL COMPLETELY SURROUNDING SAID SHAPED CROSS SECTION OF EACH OF SAID LEADS AND MAINTAINING SAID LEADS IN POSITION RELATIVE TO EACH OTHER; AND A SHEATH ENCLOSING SAID DIELECTRIC MATERIAL AND POSITIONED GENERALLY PARALLEL TO AND SPACED FROM THE OUTER SURFACES OF SAID LEADS.
References Cited (Backward Citations)
US3125733A
Cited
US863247A
Cited
US2238915A
Cited
US3023383A
Cited
US3035237A
Cited
US3076947A
Cited
US3191132A
Cited
US3227974A
Cited
US3309633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |