US3434147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna feed with polarization selectivity
Assignee: South African Inventions Development Corp
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Filing: 1966-08-08
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Granted: 1969-03-18
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Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Paul J Cabion
- 👤 Jules A Fejer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:06
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034; H; H01; H01P; H01P1/00; H01P1/16; H01P1/161; H01Q; H01Q13/00; H01Q13/02; H01Q13/025; H01Q13/0258
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A MICROWAVE TRANSMISSION APPARATUS INCLUDING A FRIST WAVEGUIDE ADAPTED TO PASS A FIRST MICROWAVE RADIATION FROM A TRANSMITTER TO AN ANTENNA AND COMPRISING AN INPUT SECTION AND AN OUTPUT SECTION, A SECOND WAVEGUIDE CONNECTED TO THE FIRST WAVEGUIDE AT THE JUNCTION OF THE INPUT AND THE OUTPUT SECTIONS, MEANS TO PREVENT MICROWAVE RADIATION POLARIZED IN A FIRST PRESCRIBED PLANE FROM PASSING THROUGH THE INPUT SECTION, MEANS TO PREVENT MICROWAVE RADIATION POLARIZED IN A SECOND PRESCRIBED PLANE FROM PASSING THROUGH THE SECOND WAVEGUIDE, THE OUTPUT SECTION BEING ADAPTED TO PASS MICROWAVE RADIATIONS POLARIZED IN AT LEAST THE FIRST AND THE SECOND PRESCRIBED PLANES, AND FORMATIONS PROTRUDING INTO THE FIRST MICROTION AND ADAPTED TO RE-RADIATE A PORTION OF THE MICROWAVE RADIATION BACK TOWARDS THE INPUT SECTION SUCH THAT THE RE-RADIATED PORTION IS POLARIZED IN THE FIRST PRESCRIBED PLANE ONLY.
Claim 2
Dependent Claim
137 words
A MICROWAVE TRANSMISSION APPARATUS INCLUDING A FRIST WAVEGUIDE ADAPTED TO PASS A FIRST MICROWAVE RADIATION FROM A TRANSMITTER TO AN ANTENNA AND COMPRISING AN INPUT SECTION AND AN OUTPUT SECTION, A SECOND WAVEGUIDE CONNECTED TO THE FIRST WAVEGUIDE AT THE JUNCTION OF THE INPUT AND THE OUTPUT SECTIONS, MEANS TO PREVENT MICROWAVE RADIATION POLARIZED IN A FIRST PRESCRIBED PLANE FROM PASSING THROUGH THE INPUT SECTION, MEANS TO PREVENT MICROWAVE RADIATION POLARIZED IN A SECOND PRESCRIBED PLANE FROM PASSING THROUGH THE SECOND WAVEGUIDE, THE OUTPUT SECTION BEING ADAPTED TO PASS MICROWAVE RADIATIONS POLARIZED IN AT LEAST THE FIRST AND THE SECOND PRESCRIBED PLANES, AND FORMATIONS PROTRUDING INTO THE FIRST MICROTION AND ADAPTED TO RE-RADIATE A PORTION OF THE MICROWAVE RADIATION BACK TOWARDS THE INPUT SECTION SUCH THAT THE RE-RADIATED PORTION IS POLARIZED IN THE FIRST PRESCRIBED PLANE ONLY.
References Cited (Backward Citations)
US3162828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |