Patent US3383630A successfully refreshed from Google Patents.
US3383630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic wave transmission device having large waveguide joined to two smaller ridged waveguides
Assignee: NEC Corp
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Filing: 1966-06-01
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Granted: 1968-05-14
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Kuroda Takaji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:49
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/08; H01P5/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
AN ELECTROMAGNETIC WAVE TRANSMISSION DEVICE COMPRISING A FIRST RECTANGULAR WAVEGUIDE AND A PLURALITY OF SECOND WAVEGUIDES BRANCHING OUT FROM SAID FIRST WAVEGUIDE AND HAVING EQUAL TOTAL WIDTH AS SAID FIRST WAVEGUIDE, EACH OF SAID SECOND WAVEGUIDES INCLUDING AT LEAST ONE ALIGNED RIDGE THAT PROVIDES A COMMON TRANSMISSION PATH TO A BAND OF FREQUENCIES BETWEEN SAID SECOND WAVEGUIDES AND SAID FIRST WAVEGUIDE.
Claim 2
Dependent Claim
61 words
AN ELECTROMAGNETIC WAVE TRANSMISSION DEVICE COMPRISING A FIRST RECTANGULAR WAVEGUIDE AND A PLURALITY OF SECOND WAVEGUIDES BRANCHING OUT FROM SAID FIRST WAVEGUIDE AND HAVING EQUAL TOTAL WIDTH AS SAID FIRST WAVEGUIDE, EACH OF SAID SECOND WAVEGUIDES INCLUDING AT LEAST ONE ALIGNED RIDGE THAT PROVIDES A COMMON TRANSMISSION PATH TO A BAND OF FREQUENCIES BETWEEN SAID SECOND WAVEGUIDES AND SAID FIRST WAVEGUIDE.
References Cited (Backward Citations)
US2989709A
Cited
US3308469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |